OK, I'm dumb, need help

They are good motors but if I wanted to be pinned back in my seat when I hit the gas I'd put an 8 in the car.
Very true! The most aggravating thing about the slant six is the staggered bore spacing. It makes it almost impossible to adapt a different cylinder head of any type to a slant six, and the point of diminishing returns is met very rapidly with the factory head. They are still a fun engine to play with! I once seen a late 70's dodge colt with the firewall moved back for a hilborn alcohol injected slant six with a piece of 2X4 zip tied under the gas pedal for a throttle stop to keep the car within its safety certification, and it was running high nines. With all the weight bias up front, I imagine it handled like newsprint in a windstorm...