Interceptor Manifolds

Art,
They are pretty rare. I found a used set for Allen but that's for SN #1. You may want to consider repairing them. Crow Custom Cast does fantastic work. I've seen several manifolds they did that you couldn't see any trace of the repair. It's expensive but considering it's CC's boat, I think they can handle it!   

Aet,
After the Masters, are you planning on pressure testing them? Barr at one time listed a Y block set. Give them a call and see if they still offer them. I've seen them and they are the typical Barr's heavy big clunky cast irons. I forgot to ask, are they the roundish or rectangular manifolds?

8122pbrainard wrote: Aet, After the Masters, are you planning on pressure testing them? Barr at one time listed a Y block set. Give them a call and see if they still offer them. I've seen them and they are the typical Barr's heavy big clunky cast irons. I forgot to ask, are they the roundish or rectangular manifolds?

Yes, Pete, as you can see in Gary's photo, they are the rectangular manifolds. They were standard on all Interceptors after 1964, I think. I'm sure you've seen Boat Dr.'s boat with the low manifolds. I spoke with the Barr distributor here in FL and he said they no longer stock or make them. I plan to contact Barr directly and see what I can find out. The used ones that are out there are starting to be hard to find, and you don't know what you're getting until you've bought them. A good fabricator could weld up stainless ones, but it would be ungodly expensive.

I'll probably test them without disassembling first. Just connect a water supply to the inlet(s) put in running position, and let it out of the dump, and look for water to show up in the ports.

8122pbrainard wrote: Art, They are pretty rare. I found a used set for Allen but that's for SN #1. You may want to consider repairing them. Crow Custom Cast does fantastic work. I've seen several manifolds they did that you couldn't see any trace of the repair. It's expensive but considering it's CC's boat, I think they can handle it!

Pete, I would probably be skeptical about repairing. The outer jacket is no sweat, that can be welded easily. It's the internal walls that worry me. You could have one repaired and a month later another spot corrodes through. I'm actually surprised that the aluminum lasts as long as it does, given the dissimilar metals in the system. Nowadays, anything that has both iron and aluminum in it gets closed cooling.

dangerwil wrote: You can have my set off of a 302. Need repair but look to be in good shape and well, free.

I appreciate the offer, but, unfortunately, the 302/351 manifolds are not interchangeable with the Y-Block series of engines.     Thanks!

Link:

You can buy them new for a fraction of what that guy on ebay is asking. Not the originals but they are new and on sale!

Oops, I meant cast metal "restorer".

Thank you, yes, I am still looking for a pair. Just to be clear, there are two types of manifolds for that engine. There is the rectangular-shaped type that mounts up next to the rocker arm covers above the exhaust ports, and there is the roundish type that hangs below the exhaust ports. I am looking for the rectangular type. The outlet risers, or as some call them, "dumps" come out to a 2-3/8 inch diameter outlet.

I'll PM you in just a minute. Thanks!

I haven't taken the manifolds off the '61 yet to test them. I am gathering parts to build a 292 or 312 for my '63, so am gathering parts. They could end up on that if the ones on the '61 test "good."   I also have a '64 with an original 312 in it as an "ace in the hole" in case I can't come up with a decent Y-block, but if I can build a good engine, I will sell the '64 complete and original. Not ready to put it on the market yet. The interior is shot, but basic boat is good and was in use when I bought it. PO ripped out the interior.

TRBenj wrote: Those look like Windsor, not y-block manifolds. I may be interested if they won't work for Art. Pm me.

Excellent observation, TRB! Y-Block manifolds have the ports almost flush on the main part of the manifold, not projecting out like those shown. They came off a 260 or a 289. Thanks for catching that; I need to be more observant.

GottaSki wrote: Perhaps moreso visually , Y-block intake and exhaust runners are reoriented much like a sb chevy is.

Not sure that I understand exactly what you mean here........ Intake runners are stacked, on top of each other.

Ah..... Now I "get" it. Thanks. You gotta talk slowly to us old codgers.