350 Tuning Issue

[cebra]

I am having a hard time getting my 350 to run correctly. I recently tore the motor down and replaced the head gaskets and everything that goes along with that. It didn't idle very well before requiring constant peddling to keep it from stalling. Now, in neutral or park it idles very high (1,700) and as soon as you drop it into gear it stalls out. I have hosed around the intake manifold and carb with starting fluid and replaced the intake manifold gasket/carb gasket a 2nd time and it didn't fix the issue. I have 17PSI on a vacuum gauge, timing is 6 degrees advanced. Any thoughts on things to check? Thanks.