thought you might be interested in price sheets...

(not sure you can read them?)

I have a 4160 Holley / 600 cfm I am going to try and I do have an approved flame arrestor already. I have a few old inboards, mostly powered by "obsolete iron", such as a 170CI/ inline six/Falcon, a /chrysler 318 "poly head"and a couple of 327CI AMC/Hudson. All of these engines are "backwards" rotation.(except the falcon six..it sets in the boat backwards or flywheel forward)

The 312 (my first) powers a 1962 Correct Craft, "Classic". It is Correct Crafts first "production" fiberglass boat and is considered by many to be "The boat to have" in that era. The boat retailed, with the trailer, for around $4500.00 in 62. That would have bought a pretty nice car! The boat has a dash mounted shifter, bench seat, and toe-heel gas pedal asnd the optional ski pull.

Here are some pics of the boat ..

minus engine....

dash ......

dash shifter / toe-heel gas pedal/ unique 540 degree sweep "ski speedo".

Literature cover....

When you block the crossover off, that will reduce the intake charge temperature. The cooler charge MAY require some carb enrichment. Heave you decided on a carburetor yet.

     Also, as previously mentioned, you'll need to find a Coast Guard approved flame arresting air cleaner. Probably get one from a Mercruiser. Tell us a little more about the boat. 

Frank/Rebop

Bristol, In ( by Elkhart) 

My thinking is blocking one side blocks flow.  Two sides blocks flow. One is just a little easier.

It didnt appear in the example I sited that exhaust gases are blasting through the crossover even with no blockoff, in a dual exhaust setup.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

A pic of a friends 312, and what I hope mine to look like someday..

Whitey,

The 170/6 banger in my 64 is mounted backwards to run a RH prop. The 312 in my 62 actually rotates RH, or backwards of its automotive counterpart.

The PO had the 312 rebuilt, but only ran it an hour or so due to problems with the twin Carter sidedraft carbs. Thats when he started to install a 4bbl. The front of the engine has to be re-plumbed and he never got it running again. The long block was painted ford red, the intake and exhaust were blue, and the marine accy's were  Marine Interceptor green....not pretty... here is a pic as I bought it...

out of the boat.....

46,

 shim stock is a good idea! Think it will be thick enough to resist exhaust pressure blowing it out? Any thoughts as to why blocking only one side?

 

 

.

I will throw this out for consideration.  For a period of about 2500 miles I used a Rams Horn on PS and a front dumping crossover on the DS, setup as dual exhaust.  To compound the differences from one side to the other, the DS was 1.75 in. tubing, and PS 2.00 in. tubing.  I figured the resulting pressure difference would be pushing exhaust gas at a fair rate through the crossover.  Not something wanted but expected until the mismatch could be corrected. 

On teardown there was no inidication any exhaust gas had entered the crossover. 

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

The mushroom like valve is the inlet side for the hot air source going to an automatic choke.  It is attached to a tube running through the manifold crossover, with the tube ending at a port on the opposite side.  You can just plug the port on the opposite side and leave the "mushroom" alone.  For block off use what is available.  The hardware store has some brass shim stock that could work.  Cut to fit.  I would only block off one side.

Wow, didnt see all the other responses before posting.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

64, Yes the motor is mounted backwards and runs right hand rotation.  I have a dog clutch fitted which is helpful when skiing as it's not such a drain on the starter turning off and on.  I researched my carbies when I replaced mine and was told by many persons (ski boat people) re marine carbies of the pros and cons.  The biggest worry is re fire and spend the money for a really good quality air cleaner to stop any back fires from exiting the carby.  Mine is just an automotive carby (with a good air cleaner) and I don't have any trouble with fuel slushing around, leaking, starving, floats etc and it gets quite rough where I go due to all the boat traffic, plus getting thrown around when skiing.  I planned as well to get a 450, but could get a 570 street avenger (exact same carby specs just updated technology for floats etc, check holley site) for the same price new as a refirbished 450, hence I went that way and been really happy with it.

Cheers Whitey

My first V8!!

Brisbane, Australia!!

Thanks to all for the input!!!  I sandblasted the intake and will plan to cut and plug the heat valve, as well as plug the crossover.

Whitey, Does your boats engine run a RH rotation as mine does/ or standard automotive LH rotation?

Billy, I got a Holley 4160 marine carb from a  friend. I think it is a 600. Was kinda looking for a 450,but will give it a try. What CFM are most of you running? Any tips on tuning the 600?

One other thing.. I gotta fess up.... I am a diehard Bowtie boy, but now have two Ford books in my library. The How to Repair and Rebuild the Y Block and the Falcon 6 Performance Handbook. I just got my 64 inboard running. It is powered by a flywheel - forward , 170CI Falcon inline six.  I would NEVER tell any of my Chebie buddies, but I have some kind of wierd fondness for the old 6 banger... hopefully this Y block will also find a spot in my heart!??!