I installed a 4 cylinder 50hp on a short shaft mid, just not enough. I have a 70hp merc I'm going to rebuild and install on the mid for my new 1552weldbilt semi v jon. Is there any mods that won't affect torque. I plan on running a jet pump on this motor besides the prop lower. Also, I'm thinking about using a new style transom bracket and swivel. Has anyone modified a long shaft swivel bracket to use with a short mid section. I want the newer style because the TnT unit is much smaller and lighter than the older twin ram setup. Lighter is always better!