Pushrods for 360 Magnum heads on 72 318

[Littlefish]

I am building a 72 318 car block with magnum 360 heads milled .030 from a 96 dodge truck *with AMC flat tappet lifters *.
So.. Ive got the crank ,pistons and cam installed the heads are sitting on it. and I would like to know if any body has expereince with this combo?
(I know that older 318 had 6.9" ball & ball hollow pushrods and the newer magnum have 7.5 " hollow pushrods) .

 

[whitey]

yes, get a length checking pushrods...It thould push the plunger between .020 & .040. Summit has a variety of lengths with ball & ball ends, 5/15 hollow pushrods.

Are these new mopar type lifters, I'm hearing ALOT of people are having problems with them including myself, even though I have a comp cam.

Anything else...give a shout.

 

[Littlefish]

The Lifters are for older AMC V8 engines you know the 304 & 401 that they put in Javeline and AMX (so, No,they are not newer mopar type lifters) ***I can make a pussrod checker out of an old pussrod by cutting it and installing a a small bolt with 2 nuts to adjust length .

 

[racingsnake440]

what sort of problems have people been having? I put together a 360LA with Magnum heads last year and wiped the cam out very quickly. I used a Summit cam with comp cams lifters and put the problem down to excessive lifter preload with the Mopar Performance conversion pushrods. I didn't measure the preload but it certainly looked excessive. Haven't had time or money to rebuild it yet.

What's the difference between the AMC and newer Mopar lifters? I'm pretty sure Comp Cams had the same part no for both.

 

[whitey]

I have, and have heard about lifter noise but when checked nothing wrong with the lifters, no bleed down. I used the mopar conversion pushrods and had a preload of .010. Got the next size up from summit (.025 longer) same noise but car runs better, no cam problems. And I have the MOPAR lifters from JEEP that THEY recommended and a comp cam.