Other possibilities include the AMT or the Revell Willys. The Revell kit has a QC that with work could be usable. I'm not sure about the AMT Willys but their instructions show one. I didn't care for either one under a gasser.
Its for a current style street rod built in the nostalgia style which of course means a loose interpretation of what really was used. The engine more than likely will be the Buick from the 29 Ford or the Caddy from the Revell Merc.
Try Evergreen Plastic. The tube will hold shape with a brass rod inside. I've bent the rod by using a metal jig and magnetics to hold it in place and then heating it to hold shape. The trick is heating it enough to hold the shape and not melt it.
Slixx doesn't show them, but they're on the auction site. If you don't get those, the kit has been re-released a number of times. I'd get a newer set. The box is forty years old. If the decals are, they won't work.