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Check out this place. Prices for brand new Gen VI 454 with roller cams seems pretty good!!!

Nauti Engines Warehouse & Machine - Products

I do agree with the above post. Salt water, just ruins everything.

He's absolutley right about the headbolt threads in the block. On those engines, the head bolts go into the water jackets. Salt,...

I agree. Not even worth messing with it. Flat tappet cams are cheap enough to replace.

My previous post, I may have been gettin a little far ahead of where your at. So, dont get nervous. I'd...

Here is what I suggest. Keep on tearing it all down. All the way to bare blocks. Saltwater, can wreak havoc on the cylinder heads, and blocks.

Once you get them down to the bare blocks, you'll...

I agree with Jim. The engine that is in the boat, is probably useable, but only after a teardown and mild freshening. I wouldnt just attempt to fire it and run it. It shouldnt cost that much to open...

I agree.

I will get in touch with a guy i know today. I think he has a 454/420 mercruiser all original, turn key with around 200-250 hours. I think it can be bought for around 2500-3k complete. Its a...

I absolutley agree with Jim. Things like scrubbing the bilge, even giving it a fresh coat of paint, stripping down brackets and stuff and painting them, etc. Take your time, keep asking questions...

Two grown men can remove and lift those drives and move them around. They are heavy, but not too crazy. Or like Scott said, use a engine hoist. Theres a lifting ring on top of the drive just for...

Also, in the ssm manual, from factory there are seal shims, between the seals. These shims can be removed which will allow new seals to ride on new part of shaft...

I had to replace the propshaft...

Sounds like you are getting some bogus information.

As for the cleaver props being "junk", far from true. Whoever told you that, is probably talking from the old days of TRS drives with the...

I got a quote of around 1000.00 per drive from Craig Collabella in florida to take my SSM drives apart, inspect, and reseal. Mine have been working fine, but would like to have them opened up and...

Other thing is, this young man, isnt very knowledgeable yet, with marine engines, rigging, etc.

For guys like us Scott, we know where to look, what to look for, and how to put it together. He'd...

I have to agree. Going with new gm, you get new blocks, cranks, rods, heads, valves, pistons, etc. Nothing has seen salt, stress, etc. Proven engine combo.

The scary part of rebuilding old...

What Jim said. The propshafts tend to rust where the seal behind the prop sits.Sometimes they can be saved if they are messed up. The older ssm were known for leaking prop shaft seals, due to what...

Prop nut should be a 1 1/2" socket or wrench. No fluid will pour out when you remove the props.

BTW, also, don't think that it can't hurt to just run it, and if it blows, it blows, no loss. For all we know, the cranks, rods, heads, etc, might all be in good condition, but things like bad valve...

Yep. The #3 propshaft tapers down right were it comes out of the lower housing. Similar to how a TRS or Bravo propshaft would. The 3A, like he says, has no taper. Just a straight big shaft.

I...

Those are definitly gil manifolds and tailpipes. I agree, ditch the muffled style tails you have now, and get some matching standard trs style gil tailpipes.

As for engines, you may be better off...

Count the splines on the propshafts. 19 spline is a #3, 26 spline is a 3a. My money is on them being #3 drives.

I would keep the gil exhaust, and not put some cheapy manifolds on the engines. You...