I have a .030 over 455, just in a 400 block, and with the xe274 and 1.65s it has gone 12.17 in my bird that weighed in at 3425 right after that pass. Thats with 6x-4s that had the bowls flowed and the egr junk removed from the exhaust ports. No actual porting was done to the heads. It makes power to about 5300 rpm and idles at about 900 in gear with a decent lopey/choppy sound. Ive always ran 93 octane in it and never had a problem, it should be right at 9.5:1. The car can do a 1.69 60 ft. time but usually goes 1.74 or so on a poorly prepped track. However i have run 111+mph so I'm thinking if the car was capable of launching better the motor could pull the car into the 11s or at least 12.0s. With fully ported heads i would think going to the xe284 would be a better match for the combo mentioned along with a taller gear than a 3.55
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79 TA clone "Birdzilla", 77 nose, .030 over 455, stock crank, home ported 6x-4 heads, xe284, torker 1, 850 brawler, th350, 3.73s, 28-10.5 m/t radial, 3650lbs, 11.22@120.
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