I have a 98 velocity that I bought with no engine harness or anything. a couple years ago I built a 454 and got a harness ten pin or something like that. Last year I bought a 502 that came complete, intake to pan was just pulled from a 38 Scarab, It seems to be 100% complete. The boat I have came with this engine stock so the stock boat harness should plug directly into it and it should provide power to everything?

So 1st ? is will my boat harness plug into this engine and work? (I can get pictures)

2nd ? I had a holley blue on boat to feed carbed engine. do I just remove that and plug the fuel line directly to filter housing or do I need a lift pump or something?

I have a thousand more ?s just need to get past these hurdles first. Ill get pics in a couple hrs.

lol I guess its a 96 ha ha

1. yes, plug the cannon plug from the boat to the plug on the engine
2. yes hook to water filter housing and the pump should be on the engine
3. Im not going to answer all thousands

holley blue needs pressure regulator.

If I am reading this right. You are going from a carbed 454 to a 502 EFI. A Holley blue will not work with EFI, you won't just need a regulator you will need 25 PSI more fuel pressure. If this is the case you have more than a thousand questions.

He didn't mention EFI.

Hopefully he mentions 1000 things before the 1000 questions ?

LOL, if I read the heading of the post "Repower Carb to EFI questions" I assume it was from carb to EFI.

His post needs more detail, if its a 502 mpi cool fuel, the fuel pump and regulator is built into it, if its complete as stated, install it and go boating

LOL.

I must have attention deficit tonight.

Even a VST 502mag would just be a matter of plugging the tank line into the fuel/water sep.