Where can I buy .740" dia x 3.500" long wrist pins?

I am guessing that this is an "off the shelf" size wrist pin that also has a "more modern" application.

The wrist pins available from the major T parts vendors as well as the piston pins supplied in the "GN" pistons for the last few years are about 1/4" too short and I don't feel comfortable using them. It would be nice if I could get some pins that already have the notch in them, but It's not necessary.

The pins in the pistons I bought from Snyder's a few years ago were about 0.742" in diameter and 3.280" long as a reference. They work fine in alu pistons, haven't checked how they would fit in a cast iron piston.

Maybe the vendors ordered the piston pins shorter than originals after complaints from buyers who got their cylinders gouged by original length pins when the rod babbitt was worn too much on the sides..?

It's easy to file and scrape the babbitt to fit the crank shaft but you have to check the side play..

I have a brand new set of .005" oversize pins that measure 3.500" long. You can have them for the price of shipping. PM is you are interested. These are NOS stock from many years ago when my Gpa collected parts.

Not to hijack the thread, but if anyone has any original old/used Ford script wrist pins that you do not want/need and can't bring yourself to throw-out, please send me a PM as I am in need of some old ones for a project.

Roger, 3.280" is too short. They are supposed to be 3.500". Actually the 8 new ones I have on my desk here are 3.239" which means they must be getting shorter...

If Ford could have gotten away with something even 1/4" shorter, they would have done it. 1/4" shorter wrist pins would have been a huge savings to the bottom line during the late teens and 1920's.

When the shorter pins were supplied a couple years ago I heard a rumor that they were shortened because of customers complaining about scored cylinder walls... Cases of scored cylinder walls were from badly off-centered connecting rods, NOT overly-long wrist pins. Essentially, one part was made different because another part was made wrong...

Bottom line, I need .740"dia x ~3.750" wrist pins with or without the notch and about 50 of them should suit my needs for the next 2 years. If someone knows of an interchange to a more modern, commonly available, wrist pin, please let me know.

I had the opportunity to inspect an engine recently that had aluminum pistons with shorter pins installed somewhere else a couple years ago and unusual wear on the pistons and pins leads me to believe that correct, longer pins are a better way to go