What round port header to use?
1968 GTO convertible 461 E-head street ported with either SP or OF cam (depending on final compression), automatic trans. I have both ceramic-coated 1 3/4" primary and 3" collector Hedmans (out of 1965 GTO, but same part number) and have new painted 2" primary and 3 1/2" collector Hooker SCs that were made for the 1968-70 A-body . Which are best for my combination? Which are easiest to install, and/or don't require oil filter, starter, etc., changes. Any first-hand installation/use stories you can share?
Thanks.
Tony
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