Get a copy of Jim Hands book for porting the heads, and building the engine as well, there is a lot of good info in that book. I did a set of #62 heads for a race gas 463 years ago following his book for guidance. With a Comp Cams XE284H hydraulic flat tappet cam that engine ran 11 teens in good air, and I eventually got high 10’s out of the heads after swapping in a Crower custom grind solid lifter cam. Later I swapped to E heads. The E heads gave me another five tenths. My Firebird weighed #3500 back then.
https://www.amazon.com/How-Build-Per.../dp/1884089674
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1969 Firebird, Tx3-455/468 machined by CVMS
E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid
850DP on E-85 by Eric Niefert/T2 1" plastic spacer
T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400
1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine)
https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be
1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine)
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