hey guys can anyone help? I am doing a complete resto on a 1975 18ft sleekcraft V bottom. and I do mean complete, the boat is currently sitting on a dolly in my garage stripped to the bare hull. I've owned the boat for a couple of years now. Originally it had a Hardin Marine 455 Olds 390 hp.
That was until disaster struck last summer on the mighty mississip. ("our version of heaven in the midwest") The oil filter gasket blew out the side and took all of about 20 seconds to destroy the engine. This was the single event that prompted the resto.
But enoughe rambling, I decided to trash the Olds and go with big block chevy power. It has a jacuzzi 12 jy with dominator conversion, B cut impeller, place diverter with bowl schims and a blue nozzel reducer, loader grate and I am thinking of adding a ride plate. The new big block is currently at the machine shop awaiting futher instruction. It's a 427 cu.in. steel crank,steel rods that will be shot-peened connected to forged pistons with a compression ratio of somwhere in the 9-9.5x1 range.(havn't ordered them yet). The cam will be hyd. lift 530 lift int@ext with 330 duration. The heads have been totally gone thru and roller rockers replace the stock rocker arms and stainless steel valves. I will be running OTT Basset water injected headers. I have not yet decided on an intake manifold or carburator yet. Iwould like to see speeds of 70+, is this out of reach or a realistic goal? The boat ran hi 50's to low 60's with the 455 olds turning 4800 rpm.What would be a good carb/intake combo,any advice would be welcome!