I am looking at building a Big Block Chevy for my '72 GMC 3/4 ton 4X4 with
factory A/C and posi traction. What cubic inch motor would be best to get
good fuel economy AND
horse power? Is it possible to get
good economy and be able to run on pump gas? Will a 396 w/ 9.6:1
compression get better economy than a 454 w/ 9.6:1 compression? How can
I get over 400 horse power out of a 396 w/ a mild cam?