He did ask about indy x heads... 1st. ..of which you have no experience with to weigh against the edelbrock.
Sub .500 lift cam, you'll probably pick up 20 hp tops. The indy x from Brian /Imm are the versions I'm referencing. The 894 x top out around 220cfm "with a good set" and the. 300 lift is around 188 cfm...so you get a decent bump in flow... then the slight bump in compression. It adds up. You weigh the cost . Have fun.
