Technical 400 SBC help/info

I have an engine that was built by someone else. Wanting to see if anyone can tell me about it with these specs...

400 SBC bored .030, 5.7 rods, eagle cast crank standard turn, flat top pistons, 64cc double hump heads, comp gold rollers, and a "mild" cam(unknown to me the specs)
Edlebrock performer intake, headman headers, and a holly 4160 750cfm.

Is this enough info to determine compression, HP estimate, etc...?

The engine runs on pump gas.

 

Would need more like gasket thickness, piston in or out of the hole, piston notch depth to be accurate. More torque than HP I would guess. Cam specs would tell. Not going to be short on power.

 

That's all the info that I have on it. I wish I had more. I'm going to be pulling the engine to do a rear main on it...maybe I get a wild hair to pull it apart so I know what's there.

 

A 406 with flat tops and those 64cc heads ... I'd guess a static compression somewhere around 11:1. As was said, a lot of other things will effect that and I'd bet you have some decent overlap on the cam to run pump gas. Have fun!

 

I wouldn't worry about HP I'd be more concerned about the 5.7" rods since 400's had 5.565" rods. Not that it can't be done but not with a stock spec 400 crank and stock spec 400 pistons. You need to know more about whats in it.

Pat

 

The pistons were shorter. Car runs fine. Has 1100 miles on it. Never missed a beat.

 

The 5.7 rod is common with many aftermarket rotating assemblies for 400 SBC's just as a 6" rod is with many 350 and 383 combos. It sounds like it could be a pretty nice motor. I wouldn't want to guess what compression ratio it is though.

 

With flat top pistons and close chamber heads it's gonna have alot of compression. Depending on the overlap on the cam...
Why not run a compression test? Never a bad idea anyways...

 

Most flat tops will give about 11-1 with 64cc heads. My 57 ford ran 12.90's with a similar 406, 700r4, 3.90 gears. It needed 93 octane, but got 20mpg on the highway. I drove it thousands of miles and made hundreds of passes at the track.
5.7 rods are stronger than 5.565 rods in the upper bolt-head area.

 

Might also want to check and see if they drilled the 400 steam holes in the heads. All of the above is good advise IMO.

 

If I was going to run it on the street I'd look for 78cc heads.

 

I know the compression is high. I wish I knew the specs on the cam. There are e3 plugs in it now and I want to get rid of those. Anyone have a good recommendation on a good standard plug? I don't want gimmick stuff.