Originally Posted By 440mopar
I have a few questions about building a 400/512. First, are Edelbrock Performer RPM heads a good/big enough head for a 512? Second, will 1 3/4" tube headers hooked to 2 1/2" diameter exhaust system be large enough for a 512? And third, is there anyone else other than 440 Source and Muscle Motors that sells 400/512 rotating assemblies?


That head works, but it works better after someone does a CNC port on them. ...or just buy Trickflows that are already ported.

If it is a street car that exhaust will work fine.

I didn't buy a kit but rather bought a Molnar crank, Molnar rods and Mahle pistons. It was great quality parts for very similar cost of a "kit". There is a handy chart AndyF posted in the tech section that helps with rod length and piston selection.


http://www.moparts.org/Tech/Archive/bb/BBM_Stroker_Pistons.html

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.