engine is stalling when coming to a stop

[Canadian Mustang]

Hey guys, I own a 1991 notchback with a 302, I just finished rebuilding the engine, the bottom end is stock except for new rings and bearings. I put on a set of edelbrock performer heads, e cam and a typhoon upper and lower intake. the timing is set to 10 degrees
and the fule pressure is at 40 psi. The car cruises fine but when I'm
coming to a stop the engine will stall out unless I give it some gas.
This is a 5 speed btw.

Thanks in advance