Going to buy some AFR heads soon just not sure about what size to buy?The motor they will be going on has stock pistons LT4 HOT cam kit,ATI blower,are the 210 or 220 cc heads to big?Should I stick with the 190cc cnc ported ones?What are you running?

 

I'm using 190's on my car they have been ported out to about 205cc . I would go with the 210's and get them cleaned up a little.
You will also need an LT4 intake if you go bigger than the 190's.