Making a Better 67 - 72

[James the III]

Originally Posted by LongBox

Thanks Gary, great idea. It's probably possible to find an 87 with decent mechanicals out there, and probably for not a lot of money.

Wonder just how much better the mileage would be with the OD trans and EFI?

To give you an idea, the 80's trucks
350 v8 3 speed non o/d automatic got 1 mpg less than the same truck with the automatic with o/d.
both are q jet carbs

EFI is nice and all, but a TBI set up, (think carb with injectors in it)
are 700-2600 bucks..

multi port efi is 3000.oo and up..
when you get the parts injectors , fuel pump ..


Do you drive this truck enough to warrant that big dollar upgrade to efi?


is the 1 mpg difference adding o/d going to be worth it,

Might try tuning the carb and ign timing curve, as a basic 350 with a vac 2nd carb in these trucks should be getting 14-15mpg around town and 18-19 highway..
with 373 gears and 27-28" tall tires.

My 402 bbc el camino got 11mpg..