So I'm almost finished building my 79 omega. But one big dilemma. I'm using regular log style exhaust for my olds and the exhaust tips in the transom sit about 6 in higher then they should. They are also 4in tips. You can see where the old tips used to be I just don't want to cut and patch. Will it be a problem if the tips are a bit higher then the snails ? Will water wash back into the motor ?
In the picture I'm pointing at a circle where the 3in tips used to be.

I would think the only problem your gonna have is the transition from the snails to the tips. The purpose of the snail is to help keep water out. However if you shut off your motor while moving along at a good pace there is always the chance for water to rush in. That's my uneducated guess

OT HEADERS !! 👍👍 solves the problem !

I have transom hole cover plates I'm selling cheap. Hit me up if interested.

Best bet would be to get the exhaust that fits the holes already there.

and how often do center rise manifolds for an olds come around?

lol never