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i know the 273 head bolt angle changed, and this affects my choice intakes, no? what were the breakdowns on 273 head change? everything else is interchangeable w/ other la blocks, right?

69sig, thnx for the reply. i agree, dual plane edlebrock, 600cfm(holly/ carter). it still has points, so mo po upgrade electronic for sure. the rear is where we differ, i had a 7 1/4 sg behind my 2nd 69 valiant w/strong 318, etc...never gave a whimper(always left 2 nice black marks too). i have...

might be buying a 69valiant 100 4 dr, 273 2bl, 7 1/4 2.76 open..... ok, heres what i want to do: headers/duals , 4bl(500-600cfm), 4:10 suregrip(i have both for the 7 1/4), 265/50 14 rear tires, cam (specs??), motor (.30 over)(would like to stay w/stock heads....at least for awhile, then maybe...