Transmission line locations

[meatbag]

Hey all. So I'm hooking up my th350 lines 76 gmc. I see some that hook right into the radiator and the other circulates through the cooler in front of radiator. I included 2 pics. I'm curious which one yall think I should go with. I just dropped a 454 in it and getting the th350 rebuilt. I'm figuring they can be hooked up either way, but not sure about the benefits. So any thoughts or advice. Please and thank you

 

[85K304SPD]

Either way they go through the radiator. With the auxiliary cooler one of them goes through the radiator, out to the aux. cooler then out to the transmission. If you have the aux. cooler, use it, if you dont, you might want to get one. It might help that TH350 live a little longer behind that 454.

 

[fast 99]

An extra cooler will extend trans life. Have 2 aux coolers plus the OEM in the rad on a Sq B used for towing. That might be excessive for most applications, but one additional cooler won't hurt, 2nd picture.