I run a 261 with 3.50 gears and an overdrive transmission (GM 89mm). At 65mph it runs 2000 rpm. I have NO issues pulling hills, and if a hill comes up there is always 3rd gear (1:1).

I get 20 mpg on the highway.

Remember 9-11-01--God Bless the USA
JUSTICE, not REVENGE, will prevail

1951 Chevy 1/2-ton Pickup truck