I know that the preferred head to use with Ys is the ECZ-G . Are there alternatives? I have purchased the Mummert hot rod kit and I need to consider the heads. Can I rework the original ones to do justice to the rest of the rebuild or is that out the window? Maybe 113 heads? What do you think? 

55Birdman  Hickory NC

Which heads do you have?  Is the hotrod kit a stroker kit?


Lawrenceville, GA

Birdman,

I bought the hot rod in a box kit too (non stroker) what valves did you get with your kit, that will obviously determine what head you can use, if you know what intakes you have will help 1.78 or 1.92 diameter???

1957 ________________ Ford

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Y Blocks, The New Flathead!

I bought the performance kit with 1.94" intake and 1.60" exhaust valves, & the 270S cam. Now my engine is 292 stock. I have everything stock except for 3x2s edlebrock 573 intake. 

55Birdman  Hickory NC

Since your name is 55birdman I am assuming you are talking about a 55 bird engine. if so the 55, 56 heads came with 1.78" valves. if your engine has been changed or work done, it could have a number of different heads on it. I think that the heads can be made to accept up to 2.02 valves but with all that work it may be easier to find some G's or 113's

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?

Which heads? Well lots of opinions and people try to promote the G heads most of all. Check the FLOW numbers of the ECZ A,B,C and D heads with the 1.92 intake valves and they are close to equal to the G heads and in my opinion a stronger head as far as combustion chamber. In the HotRod test in 1956 using ECZ A heads and larger intake valves and 10 to 1 compression they got 300 HP from a 312. A G head , unposted may have had trouble to equal that. Remember, to get the very high HP number your cam will make the car a PITA to drive. And if FOM almost impossible.

I am at the moment in negotiations (?) trying to buy a 312 out of a 60 Ford. Dont know what heads it has other that the guy thinks they are zs. I am going to look at it Sat. All I am trying to do is get a little more horsepower and some more muscle in the car. I am not racing it or anything like that . Just want it to be a little meaner on the street.

55Birdman  Hickory NC

Birdman:

Unless someone has changed the engine in the '60 it won't be a 312.  If its original, it's a 292 with 1.64" intake valves.  Look carefully.

John in Selma, IN

John - "The Hoosier Hurricane"

I thought Murrert's kit came with domed/forged pistons, that need trimming for a C/R dial-in?

If that's the case, then head criteria would likely be flow/strength/valve capacity? The "G" and "113" heads are more desirable for flat top piston use (as they have the smallest chambers), but unless the domed pistons prove problematic for flow, flame travel, etc. reasons, they might not be the best head choice.

6 VOLTS/POS. GRD. NW INDIANA

So, which do you suggest.  The engine is from a 60 Mercury. I thought it was a ford. Sorry.

55Birdman  Hickory NC