My original 400 in my 78 with just a
[email protected] cam ran mid 14s with 2.56 gears, something is a miss.
The combo should be good for low 13s easy.
As Brian had said the 3.73 will probably be a bit much with the 26". Most 275/60-15s are 28" tall, OK for them(or 1/8 mile).I could never get consistant 60 fts with DOT stickies real slicks were always better for me. Maybe 0.2-0.4 but mainly consistancy.
I have yet to see an Ultradyne unless custom ordered come with a 113 lobe sep, 110 is their standard.
my 78 weighing 3900 with a 455, UD 288/296(231/
[email protected]) Qjet, headers and a 3.42 gear would run 12.90s on street Comp TAs.That was with a 2.00 69 ft also.
Cam and convertor are where I would look first,
__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune
[email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed