[THEFERMANATOR]

Double check yourctachometer as 4200 rpm's is REALLY low for wot for that engine. I believe onc said 4500-5500 for them, but I like to see 5200-5300 rpm's wot on them(keep it below 5700 rpm's as that engine has a known harmonic in it at roughly 5750 rpm's where it causes the flywheel to rattle apart and can shatter). Your speed sounds correct though, so I would suspect you have a tachometer problem. You can look through the gallery here as I believe theres a copy of the 81 flyer that lists weights and such for it. As to rod holders, you've got a 25 year old boat, who knows what all has been done to it before you. On the plus side, it's easy enough to get a hole saw, pole holders, and some 4200, and install some where ever you want them at.