I have a 37 Chevy pickup w/56 235 motor with the 235 exhaust manifold. I am in the process of getting an exhaust sytem. I have been told there area several options; 1) use a 235 down pipe hooked up to a 37 muffler & tail pipe, 2) use the 216 down pipe & have it bent to the angle of the 235 exhaust manifold, 3) have a custom exhaust system made. I'm just at this point and weighing my options & costs. Hope this helps.