1983 70hp mercury help

[Arkansas river rat]

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!

[Fastjeff57]

I've done three Merc triples mounted on Mark 55 type towers (one with external reeds). The combination works very well and is pretty light: 150 complete with FG Shift.

Let me know if I can be of assistance.

Jeff

[Arkansas river rat]

I have alot of tools but are there any special tools I'll need to disassemble and reassemble the powerhead? I know I'll need a flywheel puller .

[mercmack]

You will need one set of the Merc ring compressors..thats a must..best place to find some is on Ebay..