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First post since 2018? Welcome to the site! I would try tuning what you have. I would start with this list: make sure throttle is coming open all the way check initial timing check total timing check compression make sure all cylinders are firing (yes, I've seen a dead plug wire)

2.56 60 ft says it all. That is terrible for your combo. I see major traction issue. With the right traction, you'd cut 1.8's. Just that alone and you are well into 14's.

yes. That kegger intake isn't stellar for performance. I would think still a little better than 93 mph in a A-body with 3.23's and 4 speed though. Still 245 hp "net". More hp and torque than a factory 340.

I agree. I use that math with my own cars to see what "potential" there may be. Stock eliminators usually get on the other side of that math - meaning going faster than that math. If I can get a street tired/highway car to go within 3 tenths of that math, I feel the car is working pretty good.

Usually that math works best for bracket cars. In other words, cars that are built and meant to 60 ft., etc. You know, 4.30 gears, slicks, if automatic 8" converter. Usually have to add .3-4 tenths for street cars.

must be a bad 60 ft. 93 mph should be 14-something. But I agree, I would think the car would run better than that 93 mph.

410 getting weak?

the "kegger" intake on the mags kill rpm's. A good dual plane intake will add hp to the upper rpm's and move the shift point up a few hundred rpms.

talking gross? 285.... about 15 less than the 360 mag. Compared to the LA 318, the 318 mag has good compression, good flowing heads, lighter rotating assembly, better ring location and roller cam that is a hair better than the 360 mag. Honestly, should run at least like a factory 340 in a...

best budget magnum intake will be 2nd hand.... watch the sale adds here, and ebay

you don't think the 2.45 gears were helpful??? LOL. 97-98 mph Gotta ask that j par guy, it's all in the tweak'n :D :D

No posi ( :poke: poke a few :D). added 4bbl, used a less lift/duration cam than a factory 360 4bbl. that's it. Car weighs 3240 if I remember correctly

105 mph should be much faster than 13.5. I'd expect a stock magnum would outrun my stock LA 360 and it went 13.9 with 2.45 gears/no headers.

Harland sharp sells a roller 1.7 roller rocker that works with all the stock valve train and heads. I put a set on my pickup 5.9

two steps forward and a one step back...... LOL... click click they go... :D I've done a lot of heads..... If it should fail, I have another way.... using a drill and a rubber hose

She is using the exact same valve lapper I have. Sorry to hear....

My Durango is a 2wd and got between 17 - 18 mpg on a 40 mile round trip commute to work at 60 mph. My 3/4 ton Ram 2wd gets the exact same.

Durango - 15.9 Ram - 16.7 Noth'n special..... noth'n fast. just some heavy factory iron...

I pieced together an old 670 Street Avenger. No more bog :) this is it on a cast TQ intake

had a 600 eddy on a 318 that I couldn't get the bog out either, with stock converter and 2.76's. But I finally got the bog out with one word..... "Holley" :D

yes.... in my Durango AND my 3/4 ton Ram :D

no, i said i have not run the EFI magnum in a Duster. I was just stating from my experiences what I'd expect. I have no doubt a 360 mag, headers, 3.91's in a A-body would be in the 12's.

i haven't done the EFI magnum, but I'd expect 13's with gears in the 2.xx's With 3.91's and headers, I'd say 12's

I'd say with that intake on it, I'd go 450.00. Intake should be worth 200.00, so you going 250 for the long block. I'd think this would be a decent deal for you. That's what i see from the picture. If i was there in person and could inspect the plugs, look in the cylinders with a light...

lightened by rust..... :D I like that ...

keep us posted :)

I say if you are using the LA 360 pan, and LA front (timing cover, etc), then just use the LA 360 pan set. They work, and I've never had an issue with them leaking. Or else, try the one piece, make a video of what you did, and show us the results so we have a future reference. If it leaks...

Aftermarket aluminum heads are designed specifically for performance. Besides weight, flow was obviously in mind. Buy 'em, bolt and go will results in immediate performance gain. Pay the price, easy performance upgrade :) Don't ever mistake that for iron heads not performing. Seen enough...

so, the answer is it's ok? if you drop in a mag with serpentine belt using mag alternator, it's ok using the '76 regulator?

If somebody dropped the mag in using the mag alternator, is that ok with the original wiring on the truck? Don't the mag alt kick out a lot more ?