Topic: S code 390 engine I.D. codes

[willy001]

I'm having a bit of trouble determining the correct engine ID codes for a 69 S code (390) with the Auto transmission.
I believe the correct code is K385S which is what ECS and Mustangs unlimited sell.
Virginia classics and NPD sell a K385T for the auto trans. They all agree on the manual trans as a K384S
So is the A/T car a K385S or a K385T?

Bill

[J_Speegle]

First question - sorry have to ask- Does your engine have the aluminum ID tag still attached to it?

Code would be stamped on it if it is.

[willy001]

Unfortunately it does not.  Truth is that's what I'm trying to find. I thought I could figure out the correct tag number by looking up the engine sticker numbers. That's when things got a bit confusing so here I am trying to find some answers. If push comes to shove I'll have Marti make a repo tag but I would much prefer an original.

[J_Speegle]

............I'll have Marti make a repo tag but I would much prefer an original.

Of course finding an original from the same time period will be a challenge.

Will look though some data and documents and see if I can provide that for you

[WT8095]

Marti's tag book lists 384 for M/T, 385 for A/T. The "S" and "T" would be change level codes, and his book does not cover that level of detail.

His book is superb, by the way. Anyone who is restoring a Mustang should own at least two copies. One for the garage and one for the nightstand 

http://www.martiauto.com/itemselection.cfm?item=Book-Tagbook

[willy001]

Thank you Jeff. Any info would be helpful.
Thanks WT8095. It appears the question now is when did the  S change to T?

[J_Speegle]

Checked my buildsheets and unfortunately no automatic cars to help out.

[WT8095]

Thank you Jeff. Any info would be helpful.
Thanks WT8095. It appears the question now is when did the  S change to T?

'75 MPC section 60.6 lists a few PCV system differences before/after 2/21/69. No mention of change levels S or T. You could get a copy of the MPC and read it cover-to-cover to look for others...   

[willy001]

Well ... good enough. Thanks for the help and suggestions.
I guess I'll start paying attention to revision codes and build dates on original tags and see if I can find a pattern.

Bill

[J_Speegle]

Just as a comment - in some cases the S or T had to do with accessories attached to the engine rather than a revision

AC - Non AC is one such example