I need some data or some results from Garrett cores. Right now I have the 1300HP Treadstone core and it has worked ok till now. The core is 25x9x3.5 and was pretty much the only one I could find that fit ok for a vertical core. The setup is a twin 7668 on a 325" motor. On 17psi I get a 50* rise above ambient on a pull, on 24psi the rise is up to 80* above ambient on a pull. Im about to push 30+psi and I know the treadstone is probably going to double the rise with 8psi more. I came across the Garrett 703521-6003 cores that are 10x12.3x4.5. I can weld two of these side by side for a core that would be 24.6x10x4.5. Would being 1" taller and 1.5" thicker make that big of a difference with switching to the Garrett core over the treadstone? Ive read that the core is night and day difference between the two. Just looking for anyone that has any experience with the Garrett stuff. Shearer maybe?