Hey everyone.

This is my first post and iam in need of a little info by everyone. Iam the owner of a 1968 Mustang Gt 390 fastback4spd. I have the Marti report and every bit of this car checks out, but one thing. The tach is a 6 grand tach, and not the standard 8 for the 390 cars. I have talked to a few people about this and have been told that because the car was built early in 1968 (Feb 20 1968 as the Marti report states ) it may have had a 6000rpm tach put in it from 1967. Any insight into this from you guys would be great.

Regards

 

I don't believe an 8,000 rpm tach was used with a 390.
Jim

 

Anybody else have some insight into this???

Help would be great.
Regards

 

I dont believe it did either, thats quite a bit of rpms for a big block to be turning.

 

68 390 GT - 325 hp @ 4800 rpm. That's not enought 'wind' to warrant an 8,000 rpm tach.
Jim

 

According to this, the 68 390 came with an 8,000 RPM tach. Now, what a 6,000 RPM is doing on your car I don't know. It could be that a PO swapped it out for some reason, or as you alluded it may have come with a 67 Tach because of the build date.
http://www.billsclassiccars.com/mustangs.html

 

I can picture a factory 390 at 5500 + rpm straining to keep itself together. As to the tach, it's a Kevin Marti question.
Jim

 

From the deep confines of my vast collection of paper comes the following - there were two 8,ooo rpm tachometer equipped instrument clusters offered in 1968, a standard interior version andone with the Interior Decoroption. No mention as to whether either was required or available as an option with the 390.
Jim

 

Probably a part of the GT package.

 

My '68 S code fastback has an 8,000 tach and itis not a GT. It was plain jane for options except for the visibility package. Build date was May of '68.