So, just rebuit the 352 in my 65 Merc. Runs great. Starts great, idles good and does not overheat. After sitting for 10-15 min it is really hard to restart. Cranks at normal speed, but no go. If I 'feather' the gas a little it will usally go, but at very low RPM and puking black smoke until it clears. I'm thinking vapor lock, or maybe the air cleaner is messing with the choke...any ideas?

Timing is about 10deg inital and the engine runs about 195 temp.

5 weeks till Reno, so I want to sort this! (and I have a hub cap that keeps falling off....)

Cheers all

g