I mever reallu thought about the fact that you are .1 - .4 twice where top just once, but that makes perfect sense. I have gotten a lot of good advice here, but I think this thread is very helpful. I am definately going to work on my set-up before I start spending more freaking money. I really hate to think of all the $$ I have wasted by listening to sales people and jumping in. I asked the machine shop I use here about porting and they thought I needed to tweak the carb, and maybe porting. Then reading many threads about the advantages of aluminum and the discussions on the chinese stuff I was looking for a reasonable alternative as I was convinced heads would solve my problem. The machine shop is expensive and $300 when I could spend $1000 for killer heads made since, kinda. Now, I am going to work on my set-up first. Need to anyway as I cut my springs and like how the car sits, but I hit a bump and it pulled the front fender out. Thankfully it was an easy fix, and happened a few times, and on the priority list, but just moved up. A good set of traction bars, front and rear springs and tweaking the carb will now take the $$ I was going to spend on the heads and then see what happens. I love the fact that my heads are GM iron as I saw a few classes in a local event that required stock type heads to be considered in the stock classes. Guess the winter was getting the best of me.