I'm installing a TCI 727 in my '70 Challenger 440. The cooling line ports come plugged from TCI and I need to make new cooling lines. I know automotive flare fittings are usually 37 degree flares. I have a couple of 45 degree flaring tools and need to buy the fittings for the 727 anyway. Has anyone gone with 45 degree flares on the cooling lines. I don't think the pressure in the lines is high enough to matter, but I thought I'd better check with the experts.
