bluebird,

All the oil pans for the GMC 228, 236, 248, 256, 270 and 302's are all interchangable. The only thing that you will have to be careful about is that the oil pump cover matches the the pan. The deeper GMC pans had different pump covers that allowed the scupper float to reach down to the correct depth. And if you already have the deep pan, the oil pump cover that is installed will not allow a shallow pan to fit.

It does sound like a re-weld of the pan you have now will work. If you go this route, I would recommend painting the inside of the pan with Glyptal. Eastwoods has this product and it has worked very well for me. It will keep the pan from rusting on the inside due to condensation. (At least any thin spots won't get any thinner from the inside grin .)

Hope this helps

"The Operation of GMC trucks is normally smooth and steady, with no loud rattling, knocking or unusual noises. A good driver will quickly become accustomed to driving a GMC truck and will get the feel of his vehicle regardless of his engineering knowledge."-TM10-1563