The best MPG mod would be buying a $2500 econo-box with a $500 repair fund. Lots of repairs can be done for $500 when DIY.
Chris142 said:Why would anyone want to use an r4 compressor? That was problem #1.
Yup. I agree with that too. The A6 while heavy is a much better compressor than the R4. He wants to drop the 305 in with it's newer style acessories and have us make the AC lines up.
BTW: Same guy removed a SB400 from his pickup and put an indstrial 366 BB in it thinking he would get better mpg. He went from 11-14 mpg to 6 mpg.