Cool, that is very helpful....

I'm not even considering bb's; too many reasons to list. But #1 is the hull is perfecty balanced w/sb's or a single bb; maintenance w/bb's would be a nightmare....then there's the weight!! And the fuel consumption!!!! I get 3+mpg @3800...also my Bravo drives will last FOREVER, if cared for....you get the picture....

The Raylar 550SB would be great if I had an extra 75k layin' around!

Wouldn't '99 350 MAG's already have the Vortec heads?

Here's a kit from Jeg's. It an Eagle cast rotating assembly for 1-piece seal blocks. With Vortec heads and a good roller cam, you should not have a problem pusing 450 HP.

I'm using almost the same kit in my 383 but I have the Competition set up that's all forged with 6.0" H-beam rods. It was about double the price of the cast kit.

http://www.jegs.com/i/Eagle/356/B13005L/10002/-1

This is what I used in mine...

http://www.jegs.com/i/Eagle/356/12010/10002/-1

Don't let the compression ratios throw you. If you're using Vortec-style heads then you can get away with almost 10:1 with premium.

Have you talked to the few engine builders that are well known for their MPI skills what their experience is with the fuel system and reprogramming the ECU? If you want to stay fuel injected (and stay close to that "reliable" 3.8mpg), that's going to be your biggest hurdle and you need to find out what they've done and get their feedback.

With that being said, how about looking at the Merc 6.2 motors to see how they're set up. What about that Scorpion 377? There's no need to re-invent the wheel, just build it better and for less money.

Fix your valve train issue and bolt on a pair of Whipples. The initial cost is quite a bit more then the prochargers but it is worth every penny in the long run. The procharger is an excellent unit, but their "kit" leaves a lot to be desired. If you have a mechanic who is well versed in prochargers then I wouldn't hesitate, but by the time you modify everything to make them run as well as the whipples do out of the box you'll be very close to the same cost..

Two Raylar LSM 550's don't cost $75K they are about $51K for twins and for what they are thats a very good price point. One of OSO's good marine engine builders can rework your 350's for an easy 450HP each with the right parts and builds. They would have to replace your stock fuel injection with something like the small block ramjet system and couple that with some good smallblock heads and a blueprint equipped forged short block and headers and a 450HP screamin smallblock would be yours. Buying a Jegs type crate motor and putting it in marine high performance use is like playing "Russian Roulette" with three bullets in the gun!! Don't buy your motors twice !!

Best Regards,
Ray @ Raylar

Mercury reman makes 400hp SBC engines. Mbam on this board sells them. http://www.offshoreonly.com/forums/s...d.php?t=187351

That's true, I did already get a quote....but I was including the new Bravo XR's or Imco's and Props I would need!