My 73 weigh's 3980 lbs according to CAT scale's With less engine and cam but more gear it has gone 14.3 at 95.25 Give that engine more timing and a Holley 650 dbl pumper using 68-70primaty jet. While the carter is good reliable carb it is no match for the holley period.I have 6 carter AVS so this is not a case of not running them. Get a Comp 268-270- 280 cam the car will be faster period. and get the timing to at least 40 degree total I get those times with a dual point dist