edelbrock heads
 

Have a pair of old Edelbrock heads and trying to identify the year or anything about them the only markings I can find are F8m85 on the head
Thanks

Re: edelbrock heads
 

Photos would help. Type of lettering, etc.

Re: edelbrock heads
 

Can you post pictures of the heads? Makes identification much easier. Top and combustion chamber side both if possible.

Re: edelbrock heads
 

The 8/85 is the Cr for 239/255 when new. No telling what they are now. Just CC then, the skin cut then to make sure they are flat. Nice find.

Re: edelbrock heads
 

Also, make sure you run the proper plugs. The stock heads usually use a Champion H-10 or equivalent, which is a 7/16" reach plug. These will be shrouded in these heads and leave sharp threads exposed that can lead to pre-ignition. Whatever you do, don't chamfer the plug holes from the inside; it will reduce the holding power of the threads in the aluminum. Most older aftermarket aluminum heads I've seen take a Champion "L" series plug, which are 1/2" reach. I have seen a few older heads that used 3/4 reach plugs, but I believe they are pretty rare.

Before you install the heads, get a few different plugs and screw them in and look at the from the inside. If you compare what you see to the stock configuration, it'll be pretty obvious what you'll need.

Re: edelbrock heads
 

Attached some photos of the edelbrock head trying to identify.
Thanks

Re: edelbrock heads
 

Can't help you on the year but I have an identical set of them on my 8BA. Found them highly used on Hemming's in 1985. The guy I bought them from said they had run them on a drag car for years. Gotta be pretty old. The numbers on mine are F7.5 M8.

Re: edelbrock heads
 

These look pretty good to me. With just alittle work should preform well. Check piston to head clearance.

Re: edelbrock heads
 

FYI, they won't clear a hi lift cam. I clearace then at a 5 deg angle for the l-100 which doesn't remove much material.

Re: edelbrock heads
 

They look like they have been milled already.

Re: edelbrock heads
 

I had mine milled to insure flatness and am running a Max 1 cam with no clearance problems.