formula 233,uhmmm. that was my first boat, 1973 233 formula, it was designed by a gentlemen i knew, the late Don Aronow, he designed original Donzi, Formula,Cigaret and some Bertrams.
Zebra, if you buy that trailer ($500 for aluminum is pretty good) replace the bearings, if you use the boat in salt water buy Timken bearings , but go to a Bearing house and ask for the set (do not buy them separatedly cone and cup), ask for the set with the letter "a" after the number, they come with special rust protection, more expensive but last a lot longer.
if you can't find them e-mail my with the part number to:
[email protected]
Lesterus