70 429CJ Buildup Questions
I'm building up an old 429CJ motor that is destined for an FFR Cobra kit car. 429 Pistons that will make a pump gas friendly compression ratio are hard to come by since I want to use the stock D0OE-R cast iron CJ heads so I am considering putting the Eagle cast 460 crank in it and Eagle I-Beam rods. 460 piston selection is much better than the 429s and I am looking at the Probe P2404F's or the Speed-Pro L2404F's (anybody have any experience with either pistons? They are close in price so wondering which one might be better) forged pistons as they should get me around 9.5 to 1. It had already been bored .030 over and .040 wouldn't clean it up so it is going to .060. It came with an Offenhauser "Dual Port" intake on it with Holley 650 double pumper. The question I have revolves around cam selection. I'm not looking to build a Viper slayer here but I'd like to stick with the original valve train if at all possible so looking for some guidance on lift/duration that will work well with this setup. I also know the 650 Holley might need to be upgraded to a 750 or more in order to make it breath. Also wondering if anybody knows the stock push rod length for this motor? Any suggestions would be greatly appreciated.
Valve Spring recommendation for D0OE-R CJ Heads
I finally got the short block together and have the cam as recommended by Golen and UltraDyne. Specs are as follows:
Cam: UltraDyne
316000 S56161
FF288/296-10H
Dur@050 Int 231 Exh 239
Lift Int 559 Exh 585
The heads are D0OE-R CJ Cast iron heads with the stock rockers. I'm assuming that the stock springs will need to be updated for this cam but am not sure how to calculate what springs I need. Any help would be greatly appreciated.