I ran a "B" from a '67 292 on my 261 for awhile, as HRL states, I had to dink with bigger jet but it ran pretty well.
I would agree, find a Carter YF calibrated for an AMC/Jeep 258 cubic inch six.

Last edited by BC59; 02/03/2025 8:58 PM.
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022