I've got a 65 conv, w/ a 289 pretty much stock except for an edelbrock 600 cfm carb, performer intake, petronix ignition, flame thrower coil, 8.8 wires, and an MSD-6. I just swapped the tranny from a C-4 to a T-5, did the shelby upper control arm drop, redid the steering, converted to Wilwood discs, and put in a dual stage power master cylinder, but for some reason the engine surges now, it's idling like cr*p, and just not running very well. Anyone got an idea what the heck might have happened? It was running smoothly before the tranny swap.