75Wagon 2.8
I think the Mercruiser they are talking about is the 3.7 liter(230 ci) 470 series 4 cylinder inboard engine. It is based on the internals of the 429/460 Ford in a Mercruiser aluminum block. The heads, pistons, rods, timing chain, lifters and flywheel were off the shelf Ford Big Block parts(well the flywheel was a 5.0). Only the block, crank, water pump and cam were unique to the 470. They were rated at 150-188 hp. And they bolt up to a Chevy smallblock bellhousing. With an aluminum 460 head the whole motor weights about what a 2.3 does and can be made to make about 300 hp naturally aspirated(oh, with 300-400 ft lbs of torque from 2000 to 5500). It's a very big four cylinder
![](http://www.sterndrives.com/470information/883278r5.jpg)
![](http://image.nettix.fi/extra/boatimg/429201_429300/moottori-mercruiser-429232_b_849af242a3a620a0.jpg)
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To give you an idea of the level of power available I would point out that the manifold on the right carried a spread bore Q-jet 750, the same carb GM used on a lot of engines over 400 ci. And that's before you mount a Boss 429 head on it, a Sawed Off Shotgun, so to speak! Sounds like fun to me.
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