My plan, hopefully the experienced guru's here will tell me where I've gone astray....
The truck is a 1970 GMC SWB 1/2 ton with rear leafs. Bone stock, unmolested. 12 bolt rear with 3.73's. Purchased running with a badly neglected Rochester "BV" that somebody swapped in place of the "MV" that is supposed to be there. A freshly remanned by "Tomco" Rochester "MV"(1bbl) has just arrived.
Trying to do everything on the cheap, as much as possible...(Please offer your opinions on the following)
1) Replace old Saginaw three speed with 700r4.
2) Install pertronix, or GM stock HEI dizzy
3) Install set of PACESETTER headers(anyone have experience? Or offer alternatives?)
4) A simple glasspack muffler with 2.5" pipe
5) 31x10.5 rubber on 15x8 alloys
BTW, I will be adding power steering, and A/C, I know this is counterproductive to adding fuel economy, but most of my driving is in town, and I live in south Florida.
Will I need to add hot water heat to the bottom of the intake if I go the header route? The headers are just under $200.00, the heat plate another $30.00. The stock exhaust intake is about $150.00 new aftermarket. (the old one is FUBAR, cracked, etc.) Will I accomplish significantly more fuel economy to offset the extra $100.00 cost?
If you were building for max MPG, what would you do that I havent thought of here?
Again I appreciate all input, if I'm wasting time and $$, please let me know. TIA