mtl_hed said:ACTUALLY, you can safley bore it 60 over. Just like a 350, since the 4.3 is the same block w/ 2 cylinders missing. And you will still have plenty of cylinder wall.
\mtl_hed said:99% sure on this. The casting is different, i think it changed in when the vortec heads came out, but the cylinder walls should bethe same width. I've seen new CameroSS's bored 60 over AND with a charger on top. So its possible.
Well ya know what I mean:thumbup: If they ever do and decent intake for these and release them, 400 would not be out of the question for a decent buck. Ya, more than a S/C, but still around one, then leave you room still for it and get over 500H.P.. Now that would be fun. I'm making 193 rwhp now, which is around 240 at the motor and I havent gone internal yet! So I know 300 is obtainable.mtl_hed said:COWARDS WAY OUT! No they are just different approaches to the same objective. If you bore out your engine boosting(or NOS) it will be more difficult as the cylinder walls will be thinner. I would like to see you make 400+ hp with NA on the 4.3. I'm not saying it can't be done, but you have to be rich AND nuts.