Thermoquads and tall spacers
I run a 1" Spacer under an 850 TQ on the 340 in my '74 (did anyway, a 6-71 blower is going on the car).
I liked it, noticed a bit of a difference in the "butt dyno" :D
TQ's are about the easiest carb there is to work on or tune, I'd rather work on a TQ than any other carb.