GT40P Head Identification

lOoks like a single plane Victor jr to me, which is what is on my 408. I think itnwould be a great manifold with the right cam. However the motor box or at least flame arrestor will need a cut or two. And that distributor won't fit, most won't without a grinder but an hei style is a definite no go.

they would ship only ups/fedex or so...thats why its so high. you need to send it to someone in the US that will send it to you on a regular mail (if possible)...

Guys....slight threadjack here, but, pertains to GT40P heads for my boat.

'76 Southwind. Freshened up 351 w/ new rings, bearings, and new stock cam. All pistons pushing 125-140 psi compression currently. A real dog out of the hole pulling skiers though.

Alan put the bug in my ear at the Clinton reunion about GT40P's, and I have been keeping my eye on ebay for a good used set.    

Questions:

- Will the GT40P heads alone wake up the power, or do I need a Performer intake as well. I plan to stay with the stock cam.

- What is the best pop for the money for improved hole shot and more power on top end for increased speed while towing? Can't seem to get it above 30-31 MPH while towing a skier.

- Also thinking about an Acme prop vs. current stock 13 x 13.

Just curious as to what has provided the biggest performance boost for others.

David DON'T. Friends don't let friends buy used heads on ebay! You just can't look at them and see what your bidding on, when it comes to used ones. I bought some last year and one is junk,it has a hole behind an intake valve to the water jacket . If it would help, your welcome to have them if you want, shipping from Algonquin to Cary would be no problem

Alan....Yes, my prop has seen better days. I chewed it up pretty good one evening on the Fox River being the good samaritan towing a guy who ran out of gas and we got into to some shallow water. But, believe it or not, while it looks rough, I only lost 1 mph. However, I do have a new/rebuilt stock prop I haven't put on yet. Todd W. told me at Clinton he would try new points as well. So, I thought I would do some testing yet this season to try my other good prop, and a tune up kit to see what that does.

By the way Alan...I appreciate your advice on the loading racks. I got mine fabricated and on the boat last weekend. They work great, and it was an easy job! Should have done that a long time ago.   

Gary....I appreciate your offer. I hear what you are saying about the used heads vs. Tri-State. Risky, I know. I just need to be careful about how much $$$ I put into the boat. I will probably never get it back out. But, I guess I can always take the heads off and transfer them to another boat (would like to get another Southwind Bow Rider). However, it wouldn't hurt to take a look at the heads you have. Lets talk offline to work something out. Maybe I will put the boat on the river and head down to Algonquin. Still itching to get it out and do some boating. Are you on the river?

Dave, I don't think you'll be impressed by putting a reconditioned stock prop on there. It may run smoother but I don't think you'll see much change in performance. You need to test with an Acme or OJ to find out whats going to work for you. The new CNC's are drastically better than what came on your boat.

Dave if you are keeping the stock cam you can also check the gt40p heads from clearwater heads..they are also fully reaconditioned but with the stock spring, they cost around $420 agains the $600 they ask for the tristate..
If you decide to change the cam then yes get the tristate ones as they have the hardened spring to handle more valve lift...

Those Explorer heads are the ones Rich. The diffrence between auto and marine are the brass freeze plugs. To mount them on a 351 you need to open the head bolt holes to 1/2"

I had a 91 5.0 sedan,a Ford program car,one of the best cars I've ever had.Bought it because of the boat,just had to have two Mustangs. I think JoeinNY runs aluminum heads, most tho just run P's. I have a set of these, Tri State some have bought from here,Clearwater. We here have found out it's cheaper and usually better to buy from these guy's as by the time you get a set of used heads,get them rebuilt, your over Clearwater or Tristates prices. You on the other hand might have an "in"