Compression Ignition Addict
Join Date: Aug 2007
Location: New Martinsville, West Virginia
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I say 4.10's, I've been running 35's for over a year now on my red truck, with 3.73's and it's doing ok, still pulls fine. If you're running an auto trans, maybe you would want 4.30's, but I'd go for the 4.10's for the lower RPM's at highway speeds.
'99 E350 DRW Stahl 11' util box van, 7.3 PSD, stock. 138k SOLD
'00 F350 extcab, 9' utility bed, dually 228k
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E'99 F250 extcab, S/Bed 211k. Sidelined due to motor issues.
'00 Excursion Limited, 7.3PSD 294k
'84 Chevy K-30, 6.2L TD, woods/trail beater. 141k