I'm pretty sure this 4.3L 8 bolt intake engine is not the original engine. I'm trying to find a small consistent water leak into my oil. The oil level doesn't go up, but I have chocolate milkshake oil when I change it. I want to install a marine head gasket set in hope of finding and stopping it. Fel Pro only shows 2 different head sets. 1 for balance shaft and the other non balance shaft. My 2001 4.3L # OM060235 is non balance Vortec. The non balance set does not look like the intake gaskets will fit my 8 bolt Vortec intake. Will they work?