Converting old 350 5.7 with a 400 tranny
I have an old very rare 1980 Vandura 3500 that is a very cool 19' motor home on a 1ton dualy.
Looking for more advice on maybe moving to a LS1 or something better even. Would be nice to have overdrive on new transmission.
Any information or advice would be appreciated.
Should have about 12k to kick at it.
Love your rig...mine is a 1982 22ft 405-570-8046..i would also like to know what you did on your ls swap..
Funny, I was just looking up this very same question! I have a 1977 GMC Vandura 3500 Class C motorhome. I currently have a carbureted small block 350, but it struggles up the hills. Looking for something with more power. I was thinking the 6.0 (fuel injected) would fit, but not certain. Any advice would be appreciated!
Been a bit, but have GMC 1980 G3500 Vandura 1-ton DRW. Have a Turbo 400 with Shift Kit & Allison Torque Converter. For power I went from stock 350 small block to a 490 ft/lb 455 hp 383 Stroker Engine. RPM is a bit high over 60 mph on highway, but did get a bit larger profile tires all four, lowered RPM a bit. Also, do not like LS1 or 700 with overdrive, a much weaker transmission. But if affordable, a gear vender will give you six ratios and overdrive. My rear is 4:10 gear ratio, a 3.73 rear gears would be better for you.
