[oletrucks] Cruising RPM's?

["Mark Self" <mark.self@verizon.net>]

With a small block and a th-350 tranny, in drive, what do you guys figure is
a comfortable engine RPM at about 70 mph?  Trying to figure what a good
rearend ratio would need to be with 29" tires.  Randy's rearends recomend
1800-2800 rpm's at 60 mph.  A 3.44 would give me 2455 RPM @ 60 mph and 2865
RPM @ 70 mph.  Are these "comfortable" RPM ranges?
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959