Idle issue when coming to stop

[bigmac73]

Gents, I have a 72-C-10, Blueprint 355 Crate engine 385 HP vortec . Holley 600 CFM DP mech sec, TH350, MSD Streetfire Dist, initial timing is 16 BDC, total advance it 34 Deg at 3000 RPM, no power brakes, no A/C

I have the Manual choke wired open , no need for it really in VA, but after truck warms up and drives excellent on Highway , good performance

When i get on the exit ramp and at stop light , I have to drive with both feet to keep it running , it does not want to idle. ???

it just started doing this a few days ago, other than that truck runs good plenty of power and easy to start in the mornings.

any thoughts on a carb issue or vac leak.