Cheaper than dirt 318 build

From the factory the '92 5.2 with the large diameter exhaust manifolds made 235 NET HP through a cat and large single exhaust.

Later ones with smaller manifolds made 10-15 less.

Most all 5.9 made 245 NET HP, again, through large single exhaust.

That 245 NET HP 5.9 was the first run 300 Gross HP "crate" 360.