I've been using bulkhead connectors to get thru the radiator support, to the trans cooler on the last 2 builds that I have done. I use hard lines on the engine compartment side, and run them down the drivers side frame rail, behind the steering box. It gets them completely away from the exhaust and linkage. I then use steel braided flex lines to go from the end of the hard lines, over to the fittings on the transmission. They need to flex on that end, so the don't crack. Now I gotta figure out how to make trans cooler lines for the 545RFE going in my 70 Duster! Good luck, and I think your motor looks GREAT. I vote polished valve covers.