Does anyone have experience with the Arizona Zcar aluminum racing radiators? Based on the responses on the oil cooler thread below we are replacing our stock radiator sooner rather than later. I know a Chevy roundy-round radiator can be adapted to the z a little more cheaply, but time is going to be an issue, and for $350 the Arizona Zcar product seems like a decent price for a bolt-in option. I just wanted to make sure others haven't had a bad experience with them before going forward. Thank you again for sharing your experience.