As Kenth said, the SD pistons would require a 4.21" stroke crank.
Could use a 400 high compression piston, but their dome is small compared to the SD piston dome. Or have some made up to work with the wanted CR you want.
The SD head is great for bigger CID engines, the RA IV is about equivalent to the SD except with smaller chambers.
Would work fantastic with turbos possibly in the 400.
__________________
John Wallace - johnta1
Pontiac Power RULES !!!
www.wallaceracing.com
Winner of Top Class at Pontiac Nationals, 2004 Cordova
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KRE's MR-1 - 1st 5 second Pontiac block ever!
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