Carb base gasket question - picture

I recommend you run one of these:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=EDL-9266&N=700+115&autoview=sku

It will keep the heat off the carb which dramatically reduces percolation.

You can get bigger accelerator pump nozzles from Edelbrock:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=EDL-1475&N=700+115&autoview=sku

I'd switch to Edelbrock jets/rods and richen that carb up. Those factory carbs were calibrated for emissions running a 195 degree thermastat and exhaust heat riser in place; they are very very lean.