If I'm in your shoes I am going to take anyone of those blocks to a machine shop, have them clean it up ,bore it ,line hone ,new cam bearings,ect. Then new forged pistons and rings gapped for boost. Then you can use whatever heads and cam you have and have some fun.
You replaced the distributor? Most new ones are absolute :poo:. My car ran like crap and stalled/shut off,I replaced three distributors from O'Reilly s.
Just maybe that's your problemo?
Well I guess we should ask where in Mexico he lives( average elevation is 3,900 ft.) Some places could be 10,00 ft.
And higher elevation does kill fuel milage......
I have done the cobra brakes about six or seven years ago and being the frugal fuch I am I put a 16 inch full-size spare from a Taurus I had in the garage.
It will fit on the rear and if I have a front flat I swap the rear then swap that one to the front.
Since all these years and miles, it is...