Originally Posted by
German Muscle
which 21+ block? 5 or 7? Also what rod? 821b? i can source everything except the 821B parts i think.
BTW its not my dyno but its a friends that i have access to. Hes already dyno'd the NR 421B and S821B.
the only blocks that are different are the k blocks and the 367 block . rod doesnt really matter but the r7 rod is the new one .
monty