[flipper35]

I know lots of street rodders use the KB pistons with no problem. It was the dual use of running hard on a track and putzing around town. I am not shooting for anything extreme either, 485hp ad 535ft/lbs out of a 408cid.

I asked two different builders since I need to have the machining done. I got two different answers. Fixit has given good advice in the past and have no reason to doubt him now. My car doesn't get a ton of miles, a few thousand per year, but they are hard miles. Why have a high performance auto if you can't open the thing up?

I don't have a lot of money to spend on stuff like this so I want to do it right. If I had known guy's like Fixit (the builders I talked to when I built the car didn't know to drill a hole in the butterfly to keep it in the idle circuit) I wouldn't be looking at building a second motor.

Anyway it can't be much worse than the guys putting pistons in the opposite bank to eliminate the preload on the cylinder walls and $200 difference in the whole scheme of things isn't that much especially if they are really yhat much better.

I was also told the cast pistons hold up better in race conditions than the KB pistons by one of the builders.