8 inch converter questions...
I drive my car on the street with 8" PTC converter. It acts very similar to my old 10" converter just puttin around town...unless I smack the load peddle. Get a good trans cooler and you should be fine. A trans blanket would be a good idea for any car with decent power. I would definitely do that no matter what else you do just for peace of mind.
Just my 2 cents on going to a bigger/better cam (great idea by the way)...you may want to spend the money you have for the converter on porting those Eddys instead. That way you can really take advantage of the bigger cam...just something to consider.