I'm running a fairly stock 250 in my '63 c-20, with the original granny low 4 speed. With the 5.13 rearend I have plently of power at low speeds. I am using the truck to pull a 25 gooseneck trailer with two antique tractors on it. The trailer and tractors weighs around 10,000. I am asking too much of my little 250? I was driving about 60 mph on the expressway yesterday, (no trailer, just empty truck) and I shelled the Cam Shaft gear. It's been about 4 years and 50,000 miles since I overhauled the motor, and used the same camshaft and gear. Would I be better off finding a small block? Was the cam gear failure related to my excessive towing use? Anybody else out there working one of these 6 cylinders hard? Anyone else out there shelled the cam shaft gear and why? I am considering dropping a bone stock 350 in. I don't think it would be too hard. Just use CD's tubular motor mount and everything should bolt right up.
Sorry, but we don't carry a tubular crossmember for the 60-66 trucks. I hear that you can use the original motor mount perces you just have to change the location of one of them. I'm not for certain because I have not done this myself but I'm sure there is plenty of people out there that has made this switch over that can advise us of what it takes.
I know this is WAY late, I have a 63 stepside and took the 230 6 banger out and installed a 350 from a 76 3/4 ton, I didn't use any new parts just the stock mtr mounts off the truck, worked great.
