Join Date: Sep 2010
Location: Huntington In.
Thanked 2,172 Times in 2,029 Posts
I don't see a need for the heavier springs unless your using a exhaust brake or going to have 4,000 rpm gov spring.
84 K5 Blazer 97 12v, 47re with E-TransControl, Dodge Dana 60 with free spin hubs, Dana 70, B&M Mega shifter
96 F350 SC dually zf5, 4x4, 92 Cummins, THD 5x12's, THD fuel pin, THD HVLP with adjustable fuel pressure mod, WM, h1c 60/60/12cm WG wired