Are these drives good. How much power can they handle? Please tell me anything good or bad about them.

Very good, Proven offshore outdrives. 800 hp.... Maybe more?

Great Drives
Parts or hard to come by!!
I would go wet sump six best bang for your money right now.

Can anyone put me onto where to buy TRS parts or a number 3 drive

Which drive would be faster the number 3 or a bravo?

Somebody........Would you buy a boat with these drives on it or would that not be good? Should these drives be replaced?

I am guessing the Bravo boat will be slightly faster. Number Three is a bigger heavier drive, requires a transmission that all suck up HP. Why would anyone take a #3 Drive off a boat unless replacing with a #4 #5 or #6? It is a great drive and can take a lot of power. I would have a #3 boat over a Bravo boat anytime. #4,5,6 are more surfacing style drives and will allow more power and higher X dimensions.

I have a good set of 3A drives complete with gimbal's.
Replacing my boat with 6's
If interested call Dennis 248 640 4114

Bravo faster to the drive shop. Depends on the power,bravos with equal power but dont like over 600 and rough seas.
Buying a #3 boat wouldn't bother me if the price was right and how many hrs on the drive since a rebuild.

I think you have 3's and then came the heavier 3a's , basically shorter versions of the early 4's and later 5's . I have owned 3's and now have 4's , have had very good luck with mine .