why so big ?
what temps are you seeing with out it ?
were is the temp sensor ?
to much cold fluid is almost as bad as to hot a fluid . they do need to warm up and let the fluid work .
i run my k30 with the sensor in the remote filter housing on the hot line out from trans . when i plow snow i plow in 4-low and use a 8ft fisher plow there commercial rated beefy units . i run stock rad cooler only and my fluid don't get in to the yellow except every so often if i get crazy with the truck . if i was to do a extra cooler i would also do a thermostatic valve to let fluid bypass it until up to the hot temp it needs to be at or more then it would open and be cooled extra .