Re: What could i possibly get for MPG with these two setups?
My thoughts are similar to rich weyand's, though, If you can tune, carb and TBI mileage may be closer.
An '87 I drove, with a 350, tbi and OD, would get 13. Unknown rear gears, but with BF Goodrich AT TA's, which I believe were 33".
Sig trucks were 11 and 13 respectfully.
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'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold  )
I'm kinda like duct tape- no real purpose, but handy to have around.
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