Quote Originally Posted by Clayman View Post
Right. I just read where super chevy did a port and polish job on a set of 5.3 heads and got almost 40hp gain. So i just thot i might do it all at once. But the truck came from the factory in 1994 with a towing package so it has a cooler already on it. I really think thats why the old 4l60 lasted as long as it did. But this is all subject to change because super chevy also stroked the 5.3 to a 383 and had it layin down over 550 hp and torque so im just toyin with all kinds of ideas right now.
Yeah, I'm not saying "don't", just saying "you don't HAVE to"... As for the factory cooler, that may or may not be sufficient, especially if you stall. I plan on putting in a cooler upgrade, possibly in series with my factory cooler (if I have one, haven't looked). I've got the same problem you do... so many ways you can go with it, its tough to choose.