Wowzers... sounds like a great starting point.

Thanks a million for the info !!!

Where does PSI put the block/casting number ?
I asked the seller and he is as clueless as I am.

Passenger side rear on block

Thanks !

Seller did confirm that he has two of the 80000795R longblocks available... so I just purchased both @ $1500ea + $225 shipping.

Hopefully I can build one good one out of the pair... assuming they have good parts inside them and have the better LS style heads.

Assuming both these engines I just bought have the LS style heads on them... are they substantially better than the stock cathedral port heads currently on my 8.1 ?
If I can get away with using these LS heads and intake instead of buying the aluminum Raylar heads... that will save a bunch of money also.

I'm not looking to spin this thing to 7k... I think 5500-5600 is plenty. I can prop the boat accordingly so I dont need to spin it any faster.

Maybe a fresh rebuild with the right camshaft will work... AND save some money.

What do these LS style heads flow and how do you identify them? Valve size? I assume they are cast iron?

From what I understand... all the LS style heads have the injector bosses integral with the head... and yes they are cast iron.

I cant speak to the valve sizes or flow numbers but would really like to know also.
If they are significantly better than the 8.1 cathedral port heads, I will give them a try.
I might get away with just dropping a bigger camshaft in a fresh PSI longblock if these heads are a viable option.

Seller just sent me a couple pics to confirm what I bought.

Looks like both are definitely the correct 80000795R blocks.