i am doing a lb7 duramax swap on a 1989 hmmwv. i have the drivetrain in; new interior; engine harness is also hooked up. The only issue is the wiring i have to leave in for the body headlights brakelights turn signals sending unit ect. The system originally used 24v but the lb7 uses 12v. i heard from others that i would have to change out the bulbs from 24v to 12v and i would also have to get a flasher/relay i assume either for the turn signals or for the wiring of the truck. If anyone has any info or a place to buy parts i would appreciate it. in exchange i can give pointers on how to do this kind of swap without breaking the bank.