Quote: Pete, there is not enough info there to give you an accurate estimate ... I do think that you would have to shift a little higher than 6000 (maybe 6200-6400), and depending on the tire height, run a 3.92 gear minimum.
My error, I meant to say 6400.
I plugged 3.91s and 4.10s into the program - the 4.10s were around 6400 just before 1000ft, and the 3.91s just after. Both were about .15 faster than the 3.55s
The data I input (Desktop Dyno) was the following:
340 bored .030 over w/ 4" stroke for 416.3 cubes
750cfm carb - (I have a 750 Holley with choke plate removed, I am milling off the air horn this fall)
Dual Plane Intake (Edelbrock Performer RPM)
10.50:1 true compression
.038 gasket thickness
Edelbrock closed chamber aluminum heads (milled to 59cc) - also input the advertised flow #s off Ebrock's website - I have highly polished chambers and exhaust ports - pushrod pinch cleaned up slightly - gasket match - did not compensate for additional flow. Head Flow Data for Dyno 2000 2.02 and 1.60 valves
Edelbrock .488/.510 cam, 234/244 @ .050 2* advanced - valve timing specs taken off Ebrock website Cam Data for Dyno 2000 Small tube headers and mufflers - (Hooker 1 5/8" headers, 2 1/2" dual exhaust w/ Flomaster 40s out the factory tips )
727 TF with manual/auto VB
3200 stall converter
3.55 PowerLock "489" case
8.5" tread - Hoosier Quick Times 26.1" tall 275x55
3480lbs vehicle weight
