if u r a boat mechanic please explain

[aussie]

finally someone who has shown a interest in what im doing with where im using it it will be the sea but i took it for its first run on a lake cause i think they work harder it was doing 32mph at 4000rpm when the pushrods broke and there not a standard push rod there a 5/16 herden pushrod the only way for then to bend is hit a piston or the rocker to bottom out i could easily repair what i got but its a 1988 model and due for a freshen up well the theroy on most engines is one hp per cubic inch in mild performance so i hopeing 220 plus hp once i get it appart ill inspect it and see what i can upgrade with even the pistons will be changed to a thinner ring and if posible a longer conrod which give the piston a longer dwell time on tdc which means more tork i wish there was someone else here who had the same engine so wee could split the parts and cost ill keep u up dated not just biulding for big revs 5500 max so i say around 45mph
cheaper than putting a outbaord and i will have to run hi octane pump fuel but will still be cheaper than running a 2stroke sooryy with the balncer a bigger one would stop alot of harmonics and vibration if u r not using the old charging system there no need to use that type weel i no for sure when i strip it
look like it will be next week cause i have been limited with a bad back THANKS FOR YOUR INTEREST