Slant 6 engines

I'll tell you what, I've got more than that from my slant running on 87 octane.

I did .100 off the head (9:1 after you factor in the new head gasket), 2x1bbl offy, dutra duals 2.25 to collector 2" out the back, mild cam compcams 252. Also converted to electronic ignition with GM HEI unit. Untuned ran 17.65 on multiple passes with 3.23 gears. Go to slantsix.org and get some recommendations, you can easily squeeze more from that without running 93 octane. The MP Cam you're using is a nice low-end torquey cam, with *very* mild street manners. Just has a little more lift and duration than the stock cam from the 70s. What does the customer want?