400 w/ 7.4:1 SCR

400 w/ 7.4:1 SCR

Thanks for all the input guys!

RustyRatRod said
That's almost a nut and bolt copy of mine. My pistons are down "only" .115 on the hole. LOL I put the old Melling 444/466 214/224 on a 112 in it. Advanced 6*. DP4B intake and will have a 780 vacuum secondary Holley soon as I get it built. It has an 800 DP on it now, but that's a tick big. C body HP manifolds. Summit plastic windage tray/oil pan gasket combo. HV oil pump. Moly rings and new bearings. Dirt CHEAP dirt road build but a lot of fun so far. Probably start fitting it sometime this year.

Yeah, I've been following your 400 build for sure. Thanks for documenting it in such great detail! I'm still on the fence on whether to toss in a mild cam or not. What valve springs are you running? My 400 does have a factory 4 bbl intake and I've got a Proform 650 DP and Holley 80457 (600 VS) I can use. I figure since its opened up, I might as well toss in a timing chain.

First things first, I'll degree the cam that's in it now just to confirm what it's got and go from there. The current cam looks to be in great shape, and it's a relatively low mile rebuild so there's small chance it's not stock.

RustyRatRod said
what are you going to use for exhaust?

When I build the 470 for it, I'll be building a set of long tubes and 3" exhaust.

For now with the stock 400, I'm just going to build a set of log-style manifolds - quick and easy style. I'm running an engine plate and mid plate, so factory manifolds aren't an option unfortunately, due to clearance issues. I've already got some header and collector flanges, 1-3/4" tubing, 2-1/4" tubing and a couple cheapie flowmaster knockoffs.

Jadaharabi said
Check this out.
Dyno a 7.5:1 400? Sure, why not?

Thanks! I followed that thread when he made that thread and completely forgot about it.

Max1196 said
Stuff a pair of these on, and gain .2 or 3! MrG. 1135G
View attachment 1715667295

Thanks! I've never used those before. Do you spray them with copper sealant, or install them dry?