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The 360 in my D200 has always run a bit funny, kinda rough idle and harder to start than it should be along with garbage fuel economy. I finally checked the slop in the timing chain by barring the engine back and forth and there is at least 8 degrees of slack so I'm going to put in a fresh...

I have a 5.9L Magnum short block in my '70 Duster with Edelbrock open-chamber heads and RPM non-Air Gap intake. I have a recurring issue where oil is leaking out from the area on the passenger-side bank where the head, block and intake mate together. I assembled the engine using the 'big bead...

So I've had my 1972 D200 pickup for a couple years now and have been doing repairs and upgrades here and there. It has a 360 which so far I've replaced the heads with rebuilt late-70s pieces (stock heads were severely worn) and when the heads were off, the cylinders were in fantastic shape, no...

This isn't in an A-body but it is an SBM, the 360 in my '72 D200 pickup is driving me nuts. It has a rough idle issue where it occasionally feels like it's down a couple cylinders, especially in gear (727 auto). I have replaced a lot of parts which needed replacing anyway and/or because I...

So it's not an A-body but since I got my 1972 D200 with a 360 running it always idled like crap even with a nice 4-bbl conversion and full ignition tune-up. Well last night I was in the process of installing some headers and broke the rear exhaust manifold stud on the pass side head. I had a...

I'm running a Summit billet distributor in my 360 (hooked up to a 2007-vintage Mallory HyFire-6A box) and I'm wondering if I might get a little more bottom-end grunt if I have the mechanical advance come in faster. It's a 5.9L Magnum short block with ported Edelbrocks and a custom-grind cam...

I wanted to put a spacer under one of my motor mounts to make my engine sit more evenly. So I go to jack up the engine the way I always do with a block of wood under the oil pan... except this time I didn't check the pan as I was jacking it up and went too far. It's pushed up about 1/4-3/8" in...

I got a fuel filter with a vapor return fitting (intentionally, would like to reduce fuel boiling) and did some searching around here about how to make it work, my car does have a return line to the tank which is kind-of a vent as I have the briefly-used (pre-charcoal canister) ECS emissions...

I figure it's as good a time as any to start a build thread for my SBM... The story starts back in February of last year (2017), the 360 in my '70 Duster gave up the ghost (story in itself) and the car has been sitting engine-less since then. I initially thought of doing a full rebuild on the...

I was about to purchase a pair of EQ Magnum heads for my build today when I came across an ad on Facebook for some used Edelbrock RPM LA heads for the same price. I didn't realize until after sending the money though that these are the stupid open-chamber ones meant for factory pop-up 340...

Hey guys, so I have a pair of stock factory Magnum heads at the machine shop now which I plan to get cleaned up with a light mill, valve job, new guides, and light pocket porting to the intake bowls. The quote comes to around $700, which I just realized is about the same price as a pair of bare...

I'm grabbing a 5.9 Magnum short block to put in my '70 Duster and I want to run the LA timing cover setup which I already have, thus V-belts. The engine I'm getting has the one-piece damper and crank pulley so I'll need to use a different one. I have a Summit SFI damper with the bolt-on...

I pulled apart the front of the 318 in my '88 Fifth Ave to replace the stock chain and sprockets as preventative maintenance (would post on the FMJ forum but way more engine experts here). I wanted to reuse the double-roller timing set I pulled off my busted 360 (broken piston ring land) with...

A while ago I posted a thread about my 360 having broken in my '70 Duster (busted piston). Well now I'm getting ready to send the 318 block originally out of the car to the machine shop for prepping. The bottom end will be pretty straightforward; zero-decked block, possible overbore, hone with...

I grabbed a super clean 1988 Chrysler 5th Avenue a couple months back as a back-up Mopar for my Duster while it's out of commission. Of course I can't leave it completely stock; I already gutted all the factory single exhaust from the manifolds back and made my own duals with side exits. Next...

I removed the valves from one of the heads on my busted 360, they all seem to have visible wear but how bad are they actually? They are from a set of factory Magnum heads I assume were reconditioned when I got them, I put about 25k miles on them with a Lunati Voodoo hydraulic (fast ramps) and...

I had a feeling this was going to happen at some point; been running this 360 on the edge of detonation for so long it was bound to fail somehow. I'm at the point now where it's back in my garage and I've confirmed that it has a rod knock on #8 cylinder by doing the plug-wire pull test while...

I'm running an Air-Gap intake on my Magnum-headed 360 and always had tuning issues with the fluctuations in temperature of this manifold. After adding a functional hood scoop with the air cleaner sealed off, even on a warm day the incoming cold air being sucked in causes my intake to cool...

General question about flat-tappet cams... during the break-in period is it the lifter faces or the cam lobes that wear off? Whenever i hear talk about proper break-in it sounds like both parts wear together but then that wouldn't make it possible to use new lifters on an old cam right? Also...

I've heard a lot of good things about Hughes rockers in general but haven't found much about their stainless steel rockers for Magnum heads in particular. I was confused at first because I didn't see in pictures any adjusting screw on the pushrod side, then I read the instructions from their...

I have a noticeable oil leak on the front pass. side of my 360 that seems to be getting steadily worse. At first I though it was coming from the dipstick but lately after going on a drive and parking the car I notice oil on the top of the mechanical fuel pump and an occasional air bubble coming...

I've been thinking about this for a while it's something that bugs me and I don't quite understand. Is the demand for big blocks that much higher than small blocks? I know it's been discussed before but how come we hear about a new BB aluminum head that's cheaper and better made coming out...

I have a Voodoo 256/262 cam in my 360 that I swapped over from my old 318 but I think my engine could really use a bigger cam. It's .060"-over, KB flat tops (10.4:1 comp), untouched Magnum heads, Air-Gap intake, Hedman shorty headers 1 5/8" and 750 Mighty Demon (when I'm racing, 625 cfm AFB for...

Just got back from the Randy Coy & Sons swap meet at Bandimere Speedway today where I think I got a pretty good deal on a carb. I was looking for a 750 Holley DP for my 360 and after an hour or so of browsing around a guy at the very end of the swap meet area had one carb sitting on his tiny...

A few months ago I installed one of those carb heat shield plates to help reduce fuel percolation (hard starting when hot, rough idling etc.) and it worked great. However it raised a new problem, that being some nasty starter kick-back when trying to start the engine warm. For my engine combo...

As we all know when it comes to V-8 exhaust on A-bodies things can be a real pain unless you drop big $$$ on TTI or Doug's headers. One lower-cost option is the Hedman Tight Tubes which is a shorty/block-hugger design. They fit great but the issue is the outlet location; it faces straight down...

I currently have a 625 cfm Carter AFB on top of my built 360 with Magnum heads and am considering getting a Holley double-pumper to use when I race the car. I have read people have had good luck with 750 cfm carbs on 360s BUT I also read that engines don't need as much carb airflow at higher...

I am looking at cam specs for calculating my dynamic compression ratio in my 360 LA with Magnum heads and noticed something that doesn't make sense... Dynamic compression is based off how late the intake valve closes after BDC, and the specs for "similar" cams between manufacturers seem to be...

This might be obvious or not a big deal but I was surprised to not find anything relating to this using the search tool. I built my first "block-up" 360 with bearing clearances on the loose side and a normal-volume oil pump. Is it better if I crank it for a few seconds before pumping the gas...

I'm frantically trying to get my Duster back together as quickly as possible before school starts next week and I keep running into issues. I swapped the 318 for a built 360 and hit a snag with the exhaust manifolds. I got a big-outlet Dakota manifold for the right side and an old '68-70 340...