I have a little problem that I need to try and pin point.
When I throw 5th gear, usually i cruise at around 2500 rpms, and thats approx 65mph. Once i push her and get to like 3500 rpms, i get a vibration which seems to be coming between myself in the driver seat and the rear, soo i'm assuming the driveshaft. But this only happens when i start to push her in 5th, and starts around 3500 rpms.
Any idea of what this could be?
Here are some parts I am working with:
Edelbrock #77639 Dome Victor Jr. Heads
Scorpion Roller Rockers 1.5 Ratio
SRP Pistons # ***** 138089 Flat Top Forged
Comp Roller Cam Kit # ***** Serial #: VS4869-12
Ferrea Comp Series #F6116-8 Intake Valves 2.080”
Ferrea Comp Series #F6104-8 Exhaust
March Pulley System
Edelbrock #1812 AVS 800 Thunder Carb (manual choke) ** should have been electric.
Professional Products #52031 Intake Manifold Single Plane Operating Range 3000 to 7500 RPM
SCAT 4340 Crankshaft
Moser 9” Ford Rear with TRAC-LOC POSI--28 Spline Pinion, 1350 Pinion Yoke-Steel
Wilwood Disc Brakes
Tremec TKO-600 5 speed Tranny with upgraded bearings
UMI Performance Suspension : Subframe Connectors, Sway Bar, Control Arms
, Panhard Bar, Tubular Front Steering Brace(aka Wonderbar), Hotchkis Springs, KYB AGX Adjustable Struts, Crossmember, Tunnel Mounted Torque Arm