The 400 w/62's will be too much compression for pump gas without the right cam to bleed off some cyl. pressure (my 400 w/670's was the same way but i ran a RAIV cam which bleed off cyl. pressures.). Even with the right cam you will need some decent gears and conv. (if auto) to have this thing perform. I would personally put in the 455, even with low comp. it will have torque (more torque = more fun). It will be nice to run with 87 gas too.
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Derek B.
Current best: 11.97@110 1.65-60' !!!
'74 ventura,  (Fired july 14/06) '74 462 4-bolt (9.5-1), SCAT, Ross, T-II w/850DP (shaker455), TH350, Conti 10'' 3800, Supercomps, Magnaflow, 3'' Pypes, 3.73's, 28x13.5-15 ET streets.
1970 Beismeyer 17' flatbottom vdrive, 11.8:1 455P, ported heads, dual Qjet tunnel ram.
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