i think thats what i have decided to do you all have been great help ill stay in touch and let you know how this project goes our goal is to cruise yellowstone park in august thanks again dave

With few exceptions, there are no 312 heads.  The good heads came from the factory on several displacements.  Further, after 50+ years, the engine can have anything on it.  And, not all 312s came with the good heads so just looking for a "312" head can get you something worse than you may already have.  If you just want a spare set of heads, that's fine but if you would like to potentially save some time and money, find out what you have first.



Lawrenceville, GA

You should at least check john mummerts website before you make any decisions.
http://www.ford-y-block.com/techincal.htm
Enjoy.

Cylinder heads depending on year are not necessarily tied to one displacement of engine. In 1957 for instance 2 or 3 sizes of engines used the same heads.   As stated before, you can check at the inside corners of the heads at the intake manifold, without removing the engine. Original 1959 heads will likely be marked 5752 or 113 on the corners. Some earlier heads had the casting marks near the exhaust ports..


Paul

currently I'm pretty sure they are 292 not sure of the casting #s to much burnt on oil hope to pull the motor after the new year and start my rebuild project did find a intake if you have or know of some 312 heads i would be very interested in buying a good rebuildable set thanks for your help Dave

A lot of 292's from 1959 had the preferred 113 heads. If that's what you have then you're good to go.

-Gary Burnette-

Which heads are currently on your engine?



Lawrenceville, GA

not using the 312 marine block its broke looking for some heads the ones on the marine are low compression

Have you checked rotation of that Marine engine yet?

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

the 312 is a Montana block and has had some ice in it result cracked block.But i do have a good crank and my 292 in the car runs good just smokes