New guy here, I'm pretty sure I'm posting this to the correct forum. If not, I apologize. Long story short, I have a blown engine...water jacket cracked on both sides and a large crack on the block under the intake. The current engine is a Mercruiser 260, serial number 6794827. Everything else is fine on it, heads accessories, everything. It will even start and run, when it gets to operating temp, that's when the oil and water start mixing. I had a client of mine give me two crusader engines in running condition, he just felt it was time to change them. Both are 5.7 350 CID just like the mercruiser. From initial inspection, it seems this will be an easy swap. But I read somewhere in here that crusaders aren't interchangeable with mercruisers. The only numbers I can get off the stickers are these, Crusader serial 099041, Model CM350L, VO4237MM Crusader replacement block. I cannot find anything other than the year the crusader engines were made on the internet. I have an alpha one out drive in great condition that I was using with the mercruiser. Anyone have any experience with this kind of swap? Good/bad news? Any help would be greatly appreciated.