As far as I know, that drive calls for the High Performance gear oil, not Premium.
If I can't get the High Performance for a good price I've been using Synthetic 75W90 for a number of years based on Bondo's recommendation.
You won't feel power touching battery + and hull.
Just like you won't if you touched the + and - terminals on the battery.
It has to overcome the resistance in your skin.
In theory it's possible, but unlikely.
A friend has a 16 ft Lund SSV utility boat.
3 bench seats, nothing else.
boat=345 lbs, 2 guys=300 lbs, 15 lb anchor and 3 gallons of fuel.
With a 25hp Honda we get 25 mph.
My bad, I measured between centers which isn't going to help you.
I just measured between the studs on an old MR/R bell housing and it's 1.50 between the studs.
I had the bell housing off when I pulled mine though.
The claw pivots so you can insert it.
https://www.summitracing.com/parts/wmr-w89326?seid=srese1&ppckw=pmax-tools&gclid=EAIaIQobChMIx-OztdjqiAMVUTcIBR0myiwAEAQYAiABEgLA-vD_BwE
Does the 1989 70hp have the power trim pump that is external to the motor with 4 hoses?
If so, it should work on the 1982.
You'll have to look at both motors and see if the mounting points for the rams are in the same place.
