Man it really sucks that Koyorad only makes radiators for 80 series and up. They are pretty much the defacto aftermarket radiator in the japanese car community. Mishimoto is a step better than CSF but koyorad is without a doubt the best. maybe we should send them a cad file and be like hey make and sell these hahaYou're not the only one I've heard this from. My CSF radiators have held up well (first one most likely only failed because I slipped and clunked my knee onto the upper tank with most of my weight behind it) though, so at least there's one good OEM grade radiator out there without having to fork over big bucks for a high performance unit like the Ron Davis.