George, I recommend Chuck Petersen of Peterson Racing in Wisconsin. He’s built a couple mags and power heads for me. His work is top notch and he’s super meticulous. A very easy guy to deal with as well.
He can do anything in the power head. Removing/re-installing the bearings and seals in those end caps can be very tricky. Ask him about the range of services he can provide. He specializes in 4 cylinder Mercurys and knows his way around them very well.
Scott
