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RPO HE4
All original paperwork from only other owner on my 1978 scottsdale 2wd big10 states it has this option, -Axle-RR-340.. I was wondering if it's 3.40? I was planning 3.73's in the future, but would it really be a big change? I don't have a lot of info on the 3.40, so any would be appreciated
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Just 1/4 less turn on the ratio. It would be a couple hundred RPM difference. I wouldn't go with 3.73's unless I had tall tires or an overdrive. 3.40 would be about the max w/ 28" tall tires and no overdrive in my opinion.
Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project