The Ford Barn

flintstone · 07-10-2016, 09:42 AM

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

JSeery · 07-10-2016, 10:41 AM

Photos would help. Type of lettering, etc.

38 coupe · 07-10-2016, 10:49 AM

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

Ol' Ron · 07-10-2016, 01:13 PM

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.

tubman · 07-10-2016, 03:39 PM

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.

flintstone · 07-11-2016, 10:09 AM

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

4t8v8 · 07-11-2016, 10:45 AM

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.

Ol' Ron · 07-11-2016, 11:38 AM

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

Ol' Ron · 07-11-2016, 11:41 AM

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.

flatjack9 · 07-11-2016, 12:19 PM

They look like they have been milled already.

4t8v8 · 07-11-2016, 09:20 PM

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

07-10-2016, 09:42 AM	#1
flintstone Senior Member Join Date: May 2010 Posts: 3,445	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

07-10-2016, 10:41 AM	#2
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: edelbrock heads Photos would help. Type of lettering, etc.

07-10-2016, 10:49 AM	#3
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 2,042	Re: edelbrock heads Can you post pictures of the heads? Makes identification much easier. Top and combustion chamber side both if possible.

07-10-2016, 01:13 PM	#4
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	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.

07-10-2016, 03:39 PM	#5
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,633	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.

07-11-2016, 10:45 AM	#7
4t8v8 Senior Member Join Date: Nov 2011 Location: NW Arkansas Posts: 526	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.

07-11-2016, 11:38 AM	#8
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	Re: edelbrock heads These look pretty good to me. With just alittle work should preform well. Check piston to head clearance.

07-11-2016, 11:41 AM	#9
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,985	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.

07-11-2016, 12:19 PM	#10
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,600	Re: edelbrock heads They look like they have been milled already.

07-11-2016, 09:20 PM	#11
4t8v8 Senior Member Join Date: Nov 2011 Location: NW Arkansas Posts: 526	Re: edelbrock heads I had mine milled to insure flatness and am running a Max 1 cam with no clearance problems.