Rebuilt and installed 292 in my 66 truck. Engine has been run in and timing set at 8 deg advance. Engine seems to be running fine but cannot get idle under 1200 rpm even with idle screw as far back as it will go. Idle mixture screws do nothing when turned (assume due to high idle). Have checked for vacuum leaks and unable to find any. PCV hose hooked up to carb and distributor vacuum hose hooked up after setting initial timing.
Brand new Edelbrock AVS 500 cfm carb, Engine is lump ported, ~9.4 compression, Clifford intake, Langdon dual exhaust, lumpy cam, GM HEI.
Assume its a carb adjustment of some sort.
Any thoughts on how to get my idle down? Thanks!