Good in a 305 with improved heads, 10:1 cr a hi rise dual plane and headers.
In a 305 it wil want a 3000 stall and a bit of gear. A 4.10 is not too much.
A manual trans works well too. A 750cfm carb is not too much Can use a slightly more agressive
valve spring for more rpm.
Power from 2500 to 6000 in a 305. Not real spunky with a stock OEM low stall converter, in a 305.