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Re: Headers.....holding motor back?
Yep, my annual beginning of April race at Speedworld has been moved to Firebird, but in May...a little worried about the heat. I'll PM Marv D about the gas turbocharging so as not to hijack the thread.
If I was the OP, I would keep the same exhaust system, and not worry about porting the heads. If I were going to save or spend money on anything in the future for better streetability (and fuel mileage), is to eventually go to an electronic fuel injection system.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
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