350/290 crate, torque converter suggestion.

[72LB]

It's a GM crate engine and trying to find someone at GM to talk to is useless.
350/290 HP Engine Specifications:
Displacement: .............................................. 350 cubic inches
Bore x Stroke:.............................................. 4.00 inch x 3.48 inch
Compression ................................................ 8.5:1
Block: ........................................................... Cast iron, four-bolt intermediate mains
Cylinder Head: ............................................. Cast iron
Valve Diameter (Intake/Exhaust): ......... 1.94"/1.50"
Chamber Volume: ........................................ 76cc
Crankshaft: ................................................... Nodular iron, 2 piece rear seal
Connecting Rods: ........................................ Forged, powdered metal, 3/8” bolts
Pistons: ........................................................ Cast aluminum
Rings: ........................................................... Cast iron
Camshaft:..................................................... Hydraulic flat tappet
Lift: ......................................................... .450" intake, .460" exhaust
Duration: ................................................ 222° intake, 222° exhaust @ .050" tappet lift
Centerline: ............................................. 114° ATDC intake, 114° BTDC exhaust
Rocker Arm Ratio: ....................................... 1.5:1
Timing Chain: ............................................... 8 mm single roller design

Originally Posted by weq92f

.
Are you having to set the idle high in Park/Neutral so that it doesn't stall/die when you put it in gear?

Could be a number of things...check this thread...

http://67-72chevytrucks.com/vboard/s...d.php?t=720661

-klb

That thread doesn't really help, I've checked for vac leaks several times and none found. From the paperwork: (The Normal engine manifold vacuum for the 350/290 HP engine is 10-12" Hg at idle (650-750 rpm), I have 15-16".