I have a pretty much built 207 in my '53 Chevy pickup. I original built the engine in the late 70s. A couple of rear end ratios & 3 different transmissions. The best it ever ran was with a Rochester 2G. The best milage is with an Edelbrock 500 four bbl. Possibly a smaller 4 bbl (Holly 390) would be better. I have used every jet/ meter combo in the Edelbrock book and several that are not in it. For the 292 I have planned for my '68 flat bed I'm going with an early '90s GM TBI injection.