thanks for the input. sorry i wasn't more clear in my first post. It's a 1939 1/2 ton, Mustang 2 front end, under cab brakes. Ive mocked it up with a 305 and shorty headers. They fit fine, but i would really like to use long tubes. The frame narrows up pretty quick towards the front, I thought maybe someone had found a set that they could shoehorn in there. lol. Im in the process of building a fairly stout 350 and would like the benefits of the long tubes over the shorties.