Reply to "Port Plates.."

I used port plates in a previous life when I ran a 69 Boss 302. As I remember the argument was you gave up a little flow for velocity, particularly on the exhaust side. I think the idea was you raise the floor of the exhaust port after it turns from the valves. Back them guys used to cut off the entire outside of the head and put on a plate so the exhaust would have a straighter path. This was before all the latest heads we have now. The original heads were comprominsed because of the shock towers in Ford cars of the time. I never dyno'd the engine back then. We didn't have the dyno's like we have now but I never detected the slightest bit of difference but I never had my butt calibrated like some here have. I'm sure some one like George, Doug or Dan will remember these things. We used them only in classes that mandated stock heads. Vince