What's up guys. Changing my spark plugs wires. 598 with marine 7000 DUI distributor. Just checking to see if it what right order to begin with. I'm placing in order I found. But doesn't seem like typical BBC. Can I get a opinion please.

looks to be a single 4-7 swap ground cam in it....standard cap different firing order

So good to go?

Only you and previous owner could know.

Custom motor could have one of tgree firing orders. And #1 location would depend on wherever dist installer put it.