350 chevy

[captbent]

anyone ever put a 350 small block set up in a v20,i have some real nice 4 bolt main 350s setting around taking up space and i can get all the marine parts on ebay cheap, i know the out drive would have to be changed,but what about the motor mounts, and is there room for this block, and the extra weight

[fishmaster63]

bent, i just purchased a 1986 v 20 with a 350. havent picked it up yet so dont know particulars but i know quite a few were sold with the small block.

[Skools Out]

there's a couple of them on this site. But is that a car motor or marine motor. if it's a car motor you'll have to change the cam to a marine cam. if you don't the motor at idle will suck water back up the exhaust into the motor due to valve over lap and duration.

[captbent]

there car motors with roller cams i new i would have to change them along with all the tin but its the mounting of the block to the boat i had that 470 with the front mount i would have to see the work that would have to be done for the small block to work and then what about HP i build these motor,s for short track racing that i never did they are up there in HP maybe a little to hot but i have the stock pistons for it

[Skools Out]

buy a set of used Mercuiser V8 SBC mounts off ebay.

[captbent]

and how do they mount to the boat

[kamikaze]

Interesting discussion. I was always under the impression that a car and boat motor rotated in opposite directions, and that was the need to replace the cam (and starter). Not that water could be sucked in through the exhaust?


Kamikaze

[jaysea]

you mite need to put brass freeze plugs in the block if your in salt water

[Franco]

BRASS FREEZE PLUGS, WATCH YOU DIPSTICK LOCATION - IT MUST CLEAR THE RISERS AND MANIFOLDS, MOTOR MOUNTS AT SECURED BY LAG BOLTS IN THE STRINGERS, USE PLENTY OF BEDDING COMPOUND ( 5200 BY 3M) AND COAT THE BOLTS ALSO. I WOULD ADD A REMOTE OIL FILTER AND OIL CHANGE HOSE

[CapnBill]

...and by the way, you'll need stainless head gaskets, and a marine water pump also... yeah it iwill run without these ... but they will both fail ,,, at the worst time!

C-Bill

[Skools Out]

water pump doesn't matter all have bronze or brass in them so that's not an issue just buy one at Advance Auto for a 1971 corvette and it is $24.95 and lifetime warranty. Just change it out every spring and tell them it's making noise. Then you know you have a new one every year for free. they even come with gaskets.

[Skools Out]

Hey kamikaze
only run reverse in twin full inboard set ups.

[Blue_Runner]

Franco, were you been dude? You lurker you :)
Miss seein ya around the site. Hows the weather down in FL?

Sorry Capt. can't say anything about the I/O thang - I don't know jack about I/O's!

[Franco]

Hey Blue, weather is great here, shorts and t shirts on the river at 5:45 am last saturday. I hadn't missed any days checking out whats happening here, just hadn't posted to much.