heads
Senior User
Joined: Apr 2006
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From: Waco, Tx
All the heads inter change except the 427med rise and high rise heads... you will have to port match the intake, if not running a 427 man., and notch the cylinder walls on any bore under 4.23....but no there should be no problem, to answer the original question. Pre smog run better, just make sure they have hardened seats.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by customcab66
does it make much of a difference to put 352 heads on a 390 block?
Some 1966/67 352 heads were drilled for smog pump manifolds, but that's the only difference, and the plugs to fill those holes are still supplied by Ford. Plugs: C6AZ-6052-A
Hardened valve seats were not available on FE (332-352-360-390-406-410-427-428) engines as original. A local machine shop can install them. Only the FT engines offered hardened seats.
Last edited by NumberDummy; Oct 13, 2007 at 02:39 AM.
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
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From: CT
[QUOTE=NumberDummy]
Some 1966/67 352 heads were drilled for smog pump manifolds, but that's the only difference, and the plugs to fill those holes are still supplied by Ford. Plugs: C6AZ-6052-A
QUOTE]
Wow really Bill?? That's good news if true!
JR, I don't see why you'd need to notch the cyl's just to swap stock heads?
Custom, make sure you use the same type of heads so they match your intake. Early heads till mid 66 were the larger lowriser ports. After that the smaller port heads were used till the late 70's. JR is correct on the 427 Medium and high riser heads. Also the tunnelports. They used larger valves and wider valve spacing in the heads.
Some 1966/67 352 heads were drilled for smog pump manifolds, but that's the only difference, and the plugs to fill those holes are still supplied by Ford. Plugs: C6AZ-6052-A
QUOTE]
Wow really Bill?? That's good news if true!
JR, I don't see why you'd need to notch the cyl's just to swap stock heads?
Custom, make sure you use the same type of heads so they match your intake. Early heads till mid 66 were the larger lowriser ports. After that the smaller port heads were used till the late 70's. JR is correct on the 427 Medium and high riser heads. Also the tunnelports. They used larger valves and wider valve spacing in the heads.
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
Someone correct me if I'am wrong here? which wont be the first nore the last..its been awhile.....I believe the LR big port heads were still used up until mid year 65 and on some 66 models....getting rid of old stock....
and even later when a stock pile of early heads were found..as my old 70 390 has the C4AE-G's on it from the factory....
RJ
and even later when a stock pile of early heads were found..as my old 70 390 has the C4AE-G's on it from the factory....
RJ
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
When it comes to what Ford used on the assembly line, anything goes. The 428CJ heads had the so called big ports too (which is a term that's misleading for the LR port) and they didn't go into production till mid 68. The 70 F100 I had back in the 80's was a 390, but when I pulled it and took it apart, it not only had 410 pistons in it, but had the 410 crank too. Bought a 410 from a 67 Merc and it turned out to be a 428.
Needsmorecoffee.
Joined: Oct 2004
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From: CT
Originally Posted by RapidRuss
Someone correct me if I'am wrong here? which wont be the first nore the last..its been awhile.....I believe the LR big port heads were still used up until mid year 65 and on some 66 models....getting rid of old stock....
and even later when a stock pile of early heads were found..as my old 70 390 has the C4AE-G's on it from the factory....
RJ
and even later when a stock pile of early heads were found..as my old 70 390 has the C4AE-G's on it from the factory....
RJ
BD that's some pretty good luck!! A 410 and a 428 not bad! Finds like that are hard to come by. Good score! There was a guy on another forum that had a complete 390 engine with a S on the back of the block. At the time I didn't realise exactly what he had. I knew the block had at least 428 wall cores. But what I didn't find out till later was those blocks not only have the crossbolt bosses but 427 cyl wall cores besides!!! Since then I've seen 2 others and both had 427 wall cores and crossbolt bosses. Guy was asking $650 complete with a set of 406 cast iron shorty headers. I could have sold the cast shortys for that easily and more or less had a free 427 block in the making. If I only knew!! LOL. Block was a 67 date code.
G.
Last edited by FFR428; Oct 13, 2007 at 12:28 PM.
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Ford Parts Specialist
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From: Simi Valley, CA
Originally Posted by FFR428
Originally Posted by NumberDummy
Some 1966/67 352 heads were drilled for smog pump manifolds, but that's the only difference, and the plugs to fill those holes are still supplied by Ford. Plugs: C6AZ-6052-A
The same plugs were used on all the 1966/79 Fords regardless of engine size to plug Thermactor Emission (smog pump) holes in the heads.
C6AZ-6052-A .. Plug for T/E holes in head
FTE sponsor DIRECTFORDPARTS (Gaudin Ford-Las Vegas) shows: List price each $4.76 / FTE member net each: $3.37
Last edited by NumberDummy; Oct 13, 2007 at 12:33 PM.
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Elder User
Joined: Jan 2006
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don't have the smog ports. the only reason I asked is because the original motor that was in the truck split the crank and I got a 390 bottom end and reused the top end of the original motor and the power and gas mileage is up. The only change that has been made is that I put a 4 bbl holley and intake that my dad found at a swap meet. Getting almost 20 mpg now.
Needsmorecoffee.
Joined: Oct 2004
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From: CT
Bill thanks that's pretty cool. My 390 has the themactor tubes and they are coming off. I have a pretty crusty set of plugs I was given but I'd rather use new. Thanks again! BTW that's a nice discount for FTE members!
Allen glad to hear it's all working out. That is great mileage.
Allen glad to hear it's all working out. That is great mileage.
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