How much horsepower for 318?

I have a freind who is really good on carbs. He disassembled mine and told me that I should get some bigger jets and a larger power valve. So I ordered size 70 jets and a larger 6.5 power valve. The reason I am sticking with the manifolds is becasue when I bought the car it had headers on it and were awful. So new ones were installed and were still awful. They hung low and were always knicked and dented up, I hated them, not to mention they looked bad. I know headers are not all that much money, but I have enough money in the engine as it is. Besides nice headers (The ones that are coated) are more expensive. I also heard that a carb with a cfm over 625 or so would be too high for a 318. So I got a great deal on the 570cfm Holley street avenger I mentioned in the first post. If I could find a rear end that was comlpete and cheap I would buy it. I am going to a swap meet in a few weeks and i'll keep my eye opened. When the time comes and I take it down the 1/4 mile I would put on my older tires from the rear. Which are bias plys with good tread. They are a tad bigger than whats on there now.

So no one thinks I would even be able to hit 14.9 O:) O:)