oil cooler

[niallypie]

hi, i have my 12a engine in the rear of my imp and have no space at front for oil cooler. i was going to mount it with a suction fan and vents in the lid. but to compensate for lack of through air i was thinking of upping the size of oil cooler. what do you think 25 row 300 long?? or bigger? any help greatly appreciated.
cheers
nially