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That was our initial plan to use the standard pistons and sleeve the cylinders.  We've contacted several well known machine shops and they are all refusing to sleeve 8 cylinders for risk of cracking the block.  The block is the original VIN stamped block to the car. If it cracks, I would not be interested in continuing the thoroughbred project, not to mention the loss of value to the car. This not be an easy decision to make.     

I was just schooled by our revered retired parts man.  over sized pistons were not offered over .003 but over sized piston ring were. No oversized service pistons will limit my options but at least finding any originals can be ruled out. 

I haven't seen any but I do see .020 and 0.030 NOS piston rings for sale on EB, so the pistons must also have been offered as service parts.

Perhaps a long shot.  Im in the middle of a 66 HP Conv thoroughbred project and am in urgent need of a set of 8 NOS or nice OEM HP 289 pistons that are .020. If anyone has a set or leads on some please message me.  I have an nos set of 8 std HP pistons I can trade if needed. 

-Matt

In the middle of a thoroughbred project with the engine apart and am hunting for a very early NOS HP 289 clutch pressure plate with light green springs. Part number C3OZ-7563-A. These were sold individually or part of a Cobra clutch kit with the clutch disc. I do have several equally cool nos parts for 65-66 that ai could trade if needed (including NOS Cobra engine dress up kit with nos HP distributor, cap, plug wires and Cobra medallions. One of several I could offer for part trade).


Matt

I had not heard of "Engineering numbers" appearing on the back side of the trunk/fender MUSTANG letters.  After reading the last two posts, I had to remove the same letter "N" from my original late 66 SJ Hi-po GT Conv to have a look.  It does have 4 small numbers that appear to be 5640 as said in the previous posts. (Photo attached). I have revised my ad and removed "Assembly line" from the description. 

As an additional resource, I've posted a photo of a set of the same letter set Ford offered in dark blue and white boxes in the late 70's or early 80's era (not for sale).  We see there are no engineering numbers but are genuine Ford parts. Just wanted to display the follow up for any potential buyers to prove my parts listed are genuine Ford parts.  Good luck finding an earlier set.

I'm listing an NOS pair MUSTANG pin letter sets.  Sorry, there are no Ford boxes or FoMoCo envelopes.  Reproduction letters are filled in on the backsides.  You can see there are hollow pockets on all the letters on these ones.  These also come with all the grommets.  $850 plus shipping for a pair or $425 for just one set.

Matt

Found

Looking for an early NOS pair of black HP 289 valve cover gaskets with the type of tabs with pointed edges.  Not the rounded corners. Photo attached of style needed.

Still looking for these, and updated the list today.

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WTB parts for 66 HP Conv project
« on: January 02, 2025, 11:02:41 PM »
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Looking for the following parts for July 1, 66 projected built SJ plant Conv.  Engine assembly 2/9/66.


1) Driver side '66 Conv kick panel.  NOS or nice OEM with no cracks or damage.  Preferably red, but cans make any color work.  Can be either standard or deluxe panel.

2) 65-66 rear bumper dated April-June '66 or '76 (M6).  NOS or good OEM with no dents, hard scratches or severe rust (good solid piece that can be re-chromed).

3) nice pair of HP exhaust manifolds dated 12/65-late Jan '66. SomeSurface rust ok, but no major rust that will leave pits when cleaned up. NOS ok as well.

3) OEM or NOS HP balancer dated 12/66-1/66 no pits or hammer marks. Have a non-dated nos piece I can possibly trade if needed.

4) NOS C6OZ-6584-A valve cover gaskets. Need the "squared corner" style tabs on both sides of the gaskets.

5) NOS 4spd top loader input shaft part # C4OZ-7017-A

6) Any NOS US Royal redline tires.

7) nice OEM engine/bell housing block plate for '66 4 spd 6 bolt. Need the plate dated approx 12/65-2/3/66. No severe rust that will leave pits when cleaned and no dents or severe scratches

8.)one (nos) 66 rear window handle with Alan screw in the side.

9) NOS 66 seat belt warning wiring kit.

10) NOS or very nice OEM 65-66 driver and pass side door panels.  Preferably red, but cans make make any color work.  No rips or tears in arm rest cup areas, no damage to door panel clip slots or warped cards.

11) NOS 13/16" sway bar bushings with assembly line ribs

12) NOS 65-66 engine ground cable

13) NOS 65-66 driver side upper and pass side lower door hinges

Found

Looking for nos 65-66 strut rods.  One or a pair.  Need them with good smooth surfaces and no abnormalities in the castings.  Minor surface rust ok.  No major rust that will leave pits.  Not interested in OEM or repros.