having re-read your post reminded me of my early body chevy ll's, and its hard to believe you could run that good with any combo with 3.08 gears-that was the culprit. And I can see where the offy would be the far better intake. My first '63 chevy ll (stick) had a 3.08 and a 194, I ran a buddy's (four banger) chevy ll with a 4.11 6.00 x 13 tires (mine was an SS with 14" tires), he killed me off the line and it took a long time in 2nd to pass him. I switched to a 3.55 and it was a new car,stout and at least 15 more mph in high gear it would pull 5000 in high. Much later a got another '63 chevy twice SS and it had a 230 motor with a3.08, still a dog (all this with 2.94 low gear three speeds} , put in a 3.55 and same story.) The 230/3.55 car would stay with a 195hp/283 equipped chevy ll (w/ 3.08)from 50 to 70 mph. Those cars really liked a 3.55 in their stock (split manifold, lots of spark advance) tune. Later ran the 194 car with a 4.11(rear ends were the same as '55 thru '64 pass, 'vette cars- easy to swap out 30 min. or so) it was really quick but high gear would top out a 95 mph (same as with 3.08 gear) Any way when you swapped to 4.10 gear this I feel is what really woke up your car (other stuff would come into there own with this gear.) now I hope i did not bore you!
