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TwoFiftyShifter · 02-23-2014, 06:50 PM

You will be turning 1500-1600 rpms at 65mph in OD with those big rubbers. That is lugging and won't help MPG.

02-23-2014, 06:50 PM	#12
TwoFiftyShifter Registered User Join Date: Nov 2008 Location: Gwinnett GA Posts: 1,803	Re: 85 K10 305 to 350 You will be turning 1500-1600 rpms at 65mph in OD with those big rubbers. That is lugging and won't help MPG. __________________ 1982 K10 SWB 1987 V20 - Sold - Doh!