302 heads and cracking

I picked up another pair, 1st set were cracked double across the int/exh and another into the chamber. The new mag'd ok set im gonna port them , flow them..and sell on here.
About 800.00 is what they go for like that.
So if you're going to port them yourself, rock auto works. If you dont know how or are going to send them out... you could have a $1000+ dollar heads real quick after performance springs, retainers, a performance valve job.

Or you could zip through them with a dremel and imagine they flow more...but just have squiggly shiny lines. Casting flash removal does dick without being a major imperfection that protrudes in the flow path. Gasket matching ...not really anything there either. The bowl, the turn, the guide boss... with out doing those 1st, properly, the other stuff is just practice with a grinder.