So the new R4 blocks and old R4 blocks are different? I was assuming they were the same just a different deck height. I was wanting to bolt on a good cast P5 head or try the P9's. I can't run a blower and billet heads in my class. Thanks for the info.
2010 Toxic Orange Challenger built by B and B Racecars! All aluminum R4/P5 engine, Proformance TH400 (3 speed) tranny, full Reid case, nodular 9" rearend, full Dragpak suspension, Protorque custom converter, BS3, PTE 85mm turbo, fire core wires, carbon doors, carbon front clip, and a whole lot more!
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