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  1. txas2step

    HP gain of 10.5-1 pistons vs 8.8-1 in a 273.

    How much difference in HP would be gained by replacing the 8.8 to 10.5 pistons? 8-10%??Been working on a 1965 2 barrel 273. It was a low miles (35K) original motor from a Dart. Rebuilt with original 8.8 pistons,rods. Honed cylinders not bored, crank polished.Heads redone. Added the E4 isky cam...
  3. txas2step

    correct '65 273 crank pulley

    The '65 273 I am just rebuilt did not have the pulleys's when I bought it. I had a set from a later model 318. The crank holes match up except 1. Is there a 273 specific crank pulley that I need to locate? Any help. Chris.
  4. txas2step

    Edelbrock 1405 ( 600 cfm) on a 273

    Anybody running a 600 cfm Edelbrock on a stock 273. Wondering if it might be too much. I have a 500 cfm on my '65 dart gt hp 273. Thanks, Chris.
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