A couple of questions about a GT 40 motor.

[Lvnspeed]

Yea I bought the yellow one. Yes its ruff but I like a challange

So what year range motor do i want? 351ho?

[DanielC]

The Gt-40 motor used in your boat is "normal" rotation. Correct Craft uses the 1.23 to 1 transmission to change the rotation so a "right hand" clockwise engine will turn a right hand propeller.

What you are doing is converting an automotive engine to marine use. A marine engine is actually closer related to an Industrial engine, than an automotive engine. Things to watch for. Firing order. Camshaft timing. Possible pollution devices, or systems. Cars and trucks have these, marine engines do not. The cooling system also has some big differences.

The block may be the same, but the deck height could be different. The cylinder heads combustion chamber could be different.

You could easily run into a few issues. You might also be able to get lucky, and just be able to swap all the marine stuff off the broken GT-40 motor, on to a new 351 long block.

[east tx skier]

Don't forget to hang onto your old flame arrestor as well.

[2gofaster]

PCM GT40s were Lightning long blocks with brass freeze plugs installed. They used the uncut 64cc GT40 head, whereas GT40 heads off of the Cobra had 62.5cc heads. Just about any block could be used, just make sure it's a 9.5 deck as there are a few 9.2 deck and 9.4 deck 351 windsor based engines out there. Very few of those, though. The cranks are a dime a dozen as are the truck connecting rods. All common between the marinized version and the Ford truck engines.

[core-rider]

You are looking for a 351W long block or short block if your heads are okay. It's true the '93-'95 Ford Lightning's came with basically the same engine, but even they differed from '93 to '94-'95. Assuming you have bad block and heads, you might get lucky and find one of the Lightning long block assemblys for sale on eBay. They come across there once in awhile. You also see GT-40 heads, intakes, etc. but all these parts cam get pricey since they are obsolete now. The Lightning came with GT-40 heads, intake, and flat tappet cam. In '94 the blocks were machined to accept a roller cam but still came with flat tappets cams.

I'm still somewhat comfused about the intake offerings PCM put out. The majority of boats I've seen had "Cobra" intakes,(basically GT-40 intake except cast aluminum instead of welded tubing) but I have seen a few with GT-40 style upper plenums. I think the lower intakes on all PCM engines were cast iron instead of aluminum like the Lightnings came with. I see them come across eBay now and then too.

The "GT-40P" heads came out in '98 I think with the Ford Explorer. They are similar the GT-40 heads, but the sparkplug location was revised to unshroud the intake valves a little more. They did make a little more power, but since the spark plugs were moved sometimes exhaust manifolds/headers can be a tight squeeze.

If you need a new block and heads you should be able to pick up any later model 351W and some GT-40 heads, then swap over all your other parts. (accesories, intake, distributor, etc.) Stick with whatever internal parts you need for that model block. If it's an early model, make sure you buy early model internal parts. Same goes for late model blocks, late model parts. Firing orders should be the same between all late model 351W.

[core-rider]

Quick search came up with these...

Just what you need, but you would have a bunch of extras you couldn't use. You could sell them to Lightning owners and make some of your money back though.

http://cgi.ebay.com/ebaymotors/NEW-1...item5ad0ca9fef

Overkill for what you need, but this short block would be bullet proof!

http://www.nloc.net/classifieds/show...ct/15169/cat/3

Used heads...

http://cgi.ebay.com/ebaymotors/Musta...item19bb5780f9

http://cgi.ebay.com/ebaymotors/Musta...item45f247a68c

http://cgi.ebay.com/ebaymotors/Ford-...item4ceeb64a8a

[Lvnspeed]

will either of these work?

http://cgi.ebay.com/ebaymotors/NEW-F...Q5fAccessories

http://cgi.ebay.com/ebaymotors/MERCR...ssoriesQ5fGear

I have a complete engine out of the boat the heads are junk and so is the block. so all I need is a long block

[core-rider]

Either one would work, but the second choice would be more suited for your needs. I would ask the seller if it comes with the GT-40 heads or not. I can't remember how many casting bars are on the end of GT-40's, but those in their picture have 3. They can look at the head just beside the valve cover gasket and there should be a "GT" cast into the heads. If not they are just plain old 351W heads.

[2gofaster]

GT40 heads have 3 casting bars. GT40P heads have 4.

[Lvnspeed]

neither motor had GT 40 heads

[bobchris]

explain why the majority of the GT-40 heads have to be drilled out to work on a 351W that uses larger head bolts if they where designed for the 351W to start with? doesn't make a lot of since.

[2gofaster]

explain why the majority of the GT-40 heads have to be drilled out to work on a 351W that uses larger head bolts if they where designed for the 351W to start with? doesn't make a lot of since.

They weren't designed for the 351 specifically. Ford used them on both the 302(93 Cobra) and the 351(93 Lightning).

[jroyal]

Lvnspeed, you should give Tim White at Inboard Solutions in Montgomery a call. Tim ran the Nautique dealership in Montgomery for years and now he's just started a place on his own. I see you are on Smith Lake. If he had anything that could help you out, it won't be that far to come pickup.

Some of his parts are listed at the link below but he probably has more that he hasn't listed:

http://inboardsolutionsllc.com/Inboa...ine_Parts.html

Tim's phone # is (334) 301-2729.

Good luck,

Jeff

[Lvnspeed]

Thansk Jeff I called him he didnt have anything he just can order a new one...

[bobchris]

They weren't designed for the 351 specifically. Ford used them on both the 302(93 Cobra) and the 351(93 Lightning).

They where designed and used on the 302 long before it was ever used on the 351W engine, the 302 is also part of the windsor family of engines. You really need to do a google search before you start with your mis-information.