After getting a price ($700.00) to port the head of my 261 I'm wondering if the bang will be worth the bucks. Here's what I've got - 261 bored 40 over, "bulldog" cam from Tom Langdon, solid lifters,Offy 2x1 intake (haven't picked out carbs yet),Fenton headers mated to a T-5 with Ford 3.55 rear end. How much difference will I see/feel with a ported head. This is a street driver Chevy '53 sedan 210.