[Coloradocobra]

I run a 428 in my car and went with a 19x26 Griffin from the start. It runs 180 to 190 most of the time and rarely sees 200 at a stop light on a hot day. I ended up having my inlet and outlet on the driver's side. To do this, Griffin put a block in the left header tank halfway up so my radiator is a dual pass. This leaves the upper right side vulnerable to air pockets so there is a bleed up there. I run a hose from the bleed to the expansion tank tube that is off of the corner of the tank - not the overflow. I had Griffen fabricate the fan mounts when it was built so the fan bolts directly to the radiator. The only times my motor overheated is when I went lean trying to get the jets sorted out and another time when my ignition retarded when the Pertronix unit went out of alignment.

Griffin will make a radiator to your exact requirements including overall dimensions, inlet and outlet sizes and orientations, bleeds, drains, and temperature or fan switch ports. The cost with the fan was very reasonable. We just faxed them a drawing of the layout and the built it to match.

How many miles on the motor? It could be a little tight right now. Also, I have heard that a runaway temperature problem can be due to improper ring and/or piston sizing. Do you have the specs?

Lastly, there is a Mile Hi Cobra Club member with a 427 that had temperature problems as you describe. A new radiator, new fan, and a much better tune allows it to run cool now.

Good luck,

Gary