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sweetk30 · 01-10-2021, 10:12 PM

if you have wheel base length put the browny box after trans but before divorced rockwell t-case .

but the bigger problem is these old trucks were NOT made to do long distance speed or todays highway speeds . the brakes are not as good as todays and other problems can show up .

i did a 4x4 napco swap for my old boss and it tops out 45-50 mph safe and decent rpm range . i dont think i would want to go much faster on them old driveline parts .

01-10-2021, 10:12 PM	#5
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: 5500 NAPCO front ??? if you have wheel base length put the browny box after trans but before divorced rockwell t-case . but the bigger problem is these old trucks were NOT made to do long distance speed or todays highway speeds . the brakes are not as good as todays and other problems can show up . i did a 4x4 napco swap for my old boss and it tops out 45-50 mph safe and decent rpm range . i dont think i would want to go much faster on them old driveline parts . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.