Great choice with the Mallory ignition system! Since it is Raw Water Cooled, let's hope that the builder used a bronze lined coolant cross-over intake manifold. The flywheel cover suggests that this engine is set up for a Merc I/O . Unfortunately, a 5.7L SBC, even if built correctly for marine cruiser use, will not produce a usable 330 horse power at the RPM in which we cruise at. The 330 hp rating occurs at 5,300/5,400 RPM or so. You may be able to pull that from a properly built 377 or 383 SBC. The upper portion of the exhaust system is an Elbow. This setup is not using spacers/risers. Suggestions for those of you doing the same or similar thing: ...while the engine has not yet been installed, purchase and install a remote oil filter system, and a remote oil drain system. ...when making the initial cam follower plunger depth adjustment (aka adjusting lifters), use the 8 stop static procedure. Do that, and you will not need to go back through them dynamically. ...if not already done, mark off the harmonic balancer up to 35 degrees BTDC. ... when timing the engine, focus on the Progressive and the Total Advance. ... I hate to see any fresh engine like this being Raw Water Cooled.... but that's your choice! I will say that it is a nice clean looking engine.
It sounds very nice my friend I have a Chris Craft scorpion 23' I'm restoring right now I'm a marine engine builder nice job but if you want a little more but bigger difference put on a set of Chevy vortex heads casting number 906 the you have over 400hp just play nice with the drive lol iv been doing marine engine for 23 years 350s 383 454 496 502 525s trust me when I say you will shit when you hit it for the first time and the camel hump will not hold a candle to the 906 vortex heads and the push rods change but big difference nice work
I forgot to mention the intake changes too I'm going to start building one next week I will post the build step by step this is a 1989 block with 1999 906 vortex heads comp cam 400hp like I said you have to play nice with the 1.50 Alpha 1 any thing over 320hp should have a Bravo 1 but if you take it ez out of the hole you will be okay and put a drive cooler on I like a nose cone on too just help with friction at high speeds on your lower unit just some ideas but I really like your exhaust I going to do that I just love the sound but my wife hates it so if it under the water off plane and quite in the harbor awesome but when I get out of the harbor I become that loud ass hole Oooo ya that's what I want I like watching sailors wave at me as I fly by lol tree huggers lol
Picture stock exhaust manifold now picture another manifold around that manifold water stays on the outside wall exhaust goes to the inside! Water in exhaust doesn’t mix until that first rubber connector coming off the riser!
It will absolutely be fine in salt water, as long as he flushes the engine after every use! My 4.3 L V6 has been in my boat for 23 years, runs and looks just as good as the day I put it in! My boat is docked in salt water all summer long!
