Hello all, first time poster, been doing a little trolling and I decided it was best to start my own thread. Needing to replace the 305 in my 1984 Sea Ray 220 because of a hole in water jacket of the engine block. Still runs like a top, but pukes out water faster than the bilge would pump it out! Wanting to swap in a 350 for the relative cost and a bump in performance. Not new to engine swaps in general, but first time in a boat. When researching purchase of long block replacement, I notice that there is a break between 1967-1986, 1987-1995, and 1996-current 5.7l engines. I know the heads changed and rear main seal changed, but what will and won’t swap into this boat I have? I am going to do any preventative maintenance while I have the lower unit off as well so any advice or input on what to check/change. Any input on places to buy a long block? I am in Michigan so I am going to contact michiganmotorz to see what they have and if I can pick it up to save freight. I think the only tool I don’t have for the job is an alignment tool for the engine alignment, but I can buy or find one to borrow I’m pretty sure. Also looking at doing an hei swap at the same time. Thanks for any pointers and information.
