Me and my friend are building a 383 with a 6 speed, aluminum drive shaft, 4th gen 10 bolt (Auburn Posi, Moser Axles, TA Performance cover, and welded axle tubes). We have the bottom end and trans in the car. He already has hooker 2055 headers and magnaflow cat back. He asked me to post on here to see what would be best for the heads and intake. He is wanting the AFR 65/195 heads with a FIRST system on top. Cam is the TPIS ZZX cam. Will all of this work together? And what is the expected hp/tq at the rear wheels? Thanks.

Also has anyone used the Scorpion narrow body aluminum 1.6 full roller rocker arms? How do you like them?

What valve springs does he need for the heads or will the stock ones from AFR be good?

What rear end gear ratio would be best? He was looking at the Motive Gear 3.73s