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Oldman, your inbox is full

Running stock 340/360 pass car log manifolds and factory duals. Otherwise stock 1989 360 with a mopar electronic ignition and edelbrock 318/360 performer intake. Trans is a 727 (1973 with part throttle kick down and transgo 2) with a CR20 converter (about 2400-2600 stall behind a 360). Gears...

The stock 360 TBI cam. I know those motors had a reputation of over scavenging the exhaust charge.

Thanks, interested to hear your opinion on advancing that cam a few degrees.

Cam is pn P5249663- hyd roller with 250/264 duration, .385/.401 lift, and 108 CL https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2640373/1.html

That cam is the same one that was used in the early 360/300 crate motors. It’s not a bad cam with the 1.6 ratio rockers that came on the magnum heads. The 318s went TBI before the 360s (88 or 89 to 1992 when the magnums came out). All 360 TBI motors had a long snout roller cam and will...

Care to post a follow-up?

I found some cheap roller regrinds online. That being said, I don't know if I want to spend the $ to swap a cam and springs. I might just degree what I have and invest in some gears. I want this build to be more pedestrian anyway. A smooth idle with good gears and a screaming TQ sounds ok to...

Baxter your PM box is full

Holley sells/sold a 3/8 throttle shaft bushing which should work on a t-quad. There is also this kit: https://quadrajetparts.com/carburetor-bushing-installation-throttle-shafts-quad-p-886.html I have a drill press but it's a small one, might just make it. Probably wouldn't cost a fortune to...

I have a 9077s on the shelf which should be large primary. I've robbed a couple parts off of it over the years but it's mostly complete. It probably only saw 15 years of road use, I got it with some other parts along the way. I think the main trouble spot on them is the base plate.

I'm in the same boat. Lately I've been very tempted to dig into one though. Harms wants $400 to restore one, which is more than I'd like to spend but probably worth it. There are also several sources for remans in the $200-225 range, but who knows what kind of bag of parts you'll be getting.

I'm just looking at the combo. Roller 318 with closed chamber heads and 9.2:1 compression vs roller 360 with open chamber heads and 8:1 cr. Assuming no port work, I'm thinking the 318 is the better combo here. If he's comfortable modding the heads and intake, then yes, it's the 360 all day...

Mopar Small-Block Intake Manifold Flow Test

I don't care if it says 360, the ports don't come close to matching up. If he wants to spend the time that's his decision but out of the box it's a 318 manifold. And for all the hype about the LD4B, that was a 273 manifold. Which is why the LD340 was born. What are you getting so worked up...

It's a great manifold for a 318 because that's what it was designed for. It can be a good intake for a 360 if you want to put the time into hogging it out.

You may also want to swap to the magnum lifters, which are now factory replacement on the 360. There may have been an issue with the tbi ones, and that might explain why there seem to be so many remanned/warranty tbi 5.9s out there.

The performer will work better on the 318 than the 360. I'm looking at a 360 swap and will be using a factory cast iron 340 intake over the performer to take advantage of the bigger ports. I want to keep stock AC so intake options are limited. If your 73 still has it's original manifolds...

My understanding is that the valve train won't handle much lift. I saw the number posted elsewhere, if I can find it I'll reference it here. The cam that's in there is the same one that was used in the magnum crate motors so it's not a total dog. The 308 heads can have an issue with over...