[John S Peterson]

Boy all this brings back some very bad memories with my 429.WE ARE TALKIN HOT 240 - 260 a real PIA I tried or thought I had tried everything, I even went up to a 23lb cap,but never would know just when it would decide to blow it's top. Right now I have a new 2 core aluminum radiator 19 in x 24 in. I angled it in at the top thinking it would expose more surface area, got rid of my original March pully now running a smaller one (smaller than yours) Rad now has filler on rad not inline near t-stat, 18 lb cap, wrapped my headers, no anti freeze, 15 inch puller fan on a thermostat...life is great, rarely excedes 200, on highway usually 195, fan cycles on and off when idling in traffic. There is more.... if interested..
John