351 to 350

[edgewater1]

have decided to put a 350 chevy in my boat instead of a 351 PCM. my transmission is in really good condition, so i want to keep it and save my self a few grand. so if there is a kit to convert the bell housing of a 350 chevy to fit a velvet drive transmission meant to fit on a 351 PCM. All on a 1991 supra sunsport.

Skidim???? could they have something

[beast 496]

Yes, there is a bellhousing available for a Chevy based block, but.....
Do you have a complete marine chevy engine? Manifolds, ignition, motor mounts, water intake system, charging system, fuel system? There is a lot more to swaping a motor than just changing a bell housing. What is wrong with the Ford? A 351 will make just as much power as a 350. ???? Al

[saltare inverts]

Would be nice to have a gm with fuel injection vs carbed 351.

[Dennis Avery]

Rather have the carbertaor any day but thats just me!!

[edgewater1]

it's a crabed 350, it's at a local shop and the guy wants a grand for it and anther grand to put it in, so 2k for a new engine sounds good to me

[edgewater1]

who makes the conversion kit for my transission(PCM)? from 351 to 350

[saltare inverts]

Have you thought of a duramax diesel?

[Mani]

Have you thought of a duramax diesel?

A diesel in an inboard? SOLD! I'm pretty sure you're kidding, but that sounds awesome! :cool: I wonder how that would fare in one of these boats.

[beast 496]

PCM makes the bell housing, not a custom made product but off the shelf item. Again you are going to also need PCM motor mounts for Chevy also. Do you have PCM manifolds for the replacement motor? What shop is doing the swap, a boat shop or a speed shop for car guys? A boat shop will have the parts availability for all of the swap you need. Al

[beast 496]

I have seen some Cummons 5.9's in many boats along with several Volvo deisels. Way to heavy and slow. The idling caracteristics of a direct drive diesel is extremly fast speed idle at 600 rpm. Remember high pitch prop, high drive ratio and low rpm's. Not well suited for ski boat applications. Al

[Mani]

Well, that was my first concern. The RPM level would be too low for skiing. Topping out at a whopping 3K rpm, that is. That does not, however, take away from the fact that I would love to see this type of thing in person.

Before I got into boating I was into fourwheeling with Jeeps. The most cherished conversion of all was the 6 cylinder Cummins conversion. Only a couple of guys I ever met had them in their Jeeps. Rock crawling is a much more suitable place for low end torque.

Edgewater, is the mechanic just charing 1K in labor or 1K for a turn key assembly? If its the former I think you're overpaying because I paid a mechanic less than half of that to mount/align/time/etc my engine. If it's the latter you're getting a steal.

[beast 496]

Mani, we too were into four wheeling for many years. We ran sand dunes in our CJ 7 With a modified 377 Mercruiser scorpian engine. Serious HP at 6,500 rpm. We ran the Badlands of southern Indiana and Colorado trails whith our Bronco. Slow crawling, rolling, sinking ect. Alot of fun but the kids all grew up. We still have both trailer queens. lol Al

[Mani]

Sadly enough I am the kid that grew up. I used to have all the time in the world to be gone for a whole weekend once or twice a month. We ran Texas and Oklahoma trails. Once I realized that my Jeep was just sitting on the trailer for two years, I decided to sell all and get into a hobby that I didn't have to drive two to four hours away for.

What axles did you run for that kind of torque? Had to be sixties, at least.

[edgewater1]

2k engine+assembly, turn key. so i thought it was good, it's a speed shop that does work on performance marine engines.