Hey gang I just finsihed the install and waiting for Spring in Tahoe to come. Its a 2000 block with EFI and Stainless Marine. It was a real hard job $$ cause the 1988 454 is so different. All the brackets had to be bought from Merc, the old ones did not work, the only physical change was I had to put a remote oil filter on cause there was no place to hang it with the EFI box. I also wanted the mechnical fuel pump so I had to pay big for the kit to hang it; the funny thing is when I connected the 1988 harness plug into the 2000 block harness connector, it went right in!!
The real drama, I hooked up some water and
I turned the key and it fired right up!

I was so happy.
I shut it down after a few minutes and drained the block to wait for spring.
Any suggestions for the first time out???
I will take it to a small quiet lake first and see if the bravo is working right and its cooling correctly. Gosh at least, I hope it works as well as the old 454 did!
Anyway nothing ventured nothing gained