I highly recommend using the Tru-Cool plate-stack type oil cooler style; very inexpensive and durable. Summitt et al sell them under the B+M brand as trans coolers (make sure you don't use push-on barb hose types, gotta go higher quality than that or you'll burst a hose and oil the track, BTDT). The best value that I'm using right now is an 8.5"x11" one from Racer Parts Wholesale, cost was around $50-60 new. Incredible level of cooling, never overheats anymore, in spite of the hardest flogging in 100 deg temps ambient (running WOT for over 20 minutes on a road course). I've also stuffed the thing into the gravel traps more times than I care to admit, without damage - just poke out all the gravel bits. I doubt even the expensive Mocal coolers would survive that.
Sandwich plates are great, though I prefer a remote filter mount adapter even more - no more inverted oil filter mountings.
http://www.racerpartswholesale.com/cooler1.htm
OK, it's $65 for the 8x11". Maybe it's Summit or Jeg's that has it cheaper.
