Oops, haven't been here since early December...
I ended up receiving the new heat exhanger from Lenco and it looks like really good quality.. It was a lot heavier than the OEM heat exhanger.. not sure if thats any indicator of quality though.
Ended up getting it installed with a few minor hiccups (mostly me being dumb)... I did a pressure test once it was installed and found a leak.. Ended up being the hose from the coolant reservoir to the crossover tube.. Ordered and fixed that and happy to report no more cooling system leaks.
After that was sorted out, I ended up pulling my injectors and sending them off to get cleaned since I have a cool fuel 3 module. The module surprisingly seemed to still have paint inside so I don't think they are clogged, but being as old as they are, and the boat having sat for 3 years, figured it was a good idea. Still waiting to get them back, hopefully they all test good.
I think once I get the injectors back in and reinstall the wiring harness, I will be ready to fire it up on the stand and test it out.
I think I know the answer to this, but can these motors be run out of the boat the same as all the old (dumb) carbed motors? I had done it with my 5.7L by just jumping the 3 pins in the engine harness.. I'm just wondering if with all this other wiring, there are other components that need to be hooked up to the motor and if not, the PCM will be cranky and not let the engine run if it doesn't "see" something?
I'm assuming it won't be an issue, but curious if anyone knows for certain?
It would suck to have to reinstall it in the boat just to find out there are issues and then have to pull it again.