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Old 12-19-2021, 01:28 AM
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TransAm 474 TransAm 474 is offline
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Join Date: Jun 2004
Location: Cape Fair,Mo
Posts: 795
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My brother ran an HO Racing HC-02-A with standard lifters in an automatic, stock 1971 455 H.O. Blue with White Stripe Trans Am. I don't have the camshaft card anymore, but I specifically remember it reading 301/313 Advertised Duration, 232/242@.050, .465"/.469" lift, and 112° Lobe Separation. It ran really well for a basically stock 1971 455 H.O. with stock, low 8-1 compression. It had mild stuff done to it, like a HO Racing distributor advance curve kit, and maybe some different Primary/Secondary Rods for the factory Qjet. He ran the Crane HI-6 ignition, Super Duty rods, Forged flatop pistons and it was Balanced. It had stone stock 197 HO heads, stock HO Intake, and stock HO round port manifolds. There were zero problems with power brakes, even with the low compression and standard lifters. This was back in the late 90's/early 2000's, and looking back on it now, there was alot of potential left on the table with that car. Had a real nice idle around 750-800 RPM that I would describe as "Racy", not "Rough" or "Lopey". He ran 3.42 gears, the factory TH400 beefed up internally and a TCI Breakaway(2400 stall) converter in it.

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1978 Trans Am
Pump Gas 461 Stroker