Topic: Coil Spring PNs, Rates, Dimensions

[Angela]

My specific question pertains to a '70 Mach1, 428 4-spd built at Dearborn in October of '69. That said, I think the question generically pertains to all years/models and thus please feel free to move this thread as deemed appropriate.

I'm looking for a table showing coil spring PNs, dimensions, rates etc for specific year(s) and application(s).  The Mustang Restoration Handbook, for example, contains one such table, yet I'm looking for additional sources of this same information.

For example, the table mentioned above states the following for 1970 428 Mach1:
w/AC only: 1760lb, 0.650" dia, 8-3/4 turns, 14-7/8" long
w/AC  & PS:  1850lb, 0.650" dia, 8-3/4 turns, 15-1/8" long

However, the coil springs I removed from the car are 0.650" dia, 8-1/2  turns, 15-1/8" long.  We all know that these spring could have been changed throughout the car's life, however in this case I'm 99% certain I was the first person to have disassembled anything on this car. The springs do not show signs of having been cut.

At the end of the day, I want to understand (a) my original springs VS (b) Ford info VS (c) what's available from Eaton, NPD, etc.
I believe the following are the PNs called out by Eaton and NPD, yet I cannot find any dimensional information associated with either PN:
1970 Mach1 428 w/o AC = Eaton MC1278 (NPD 5310-10E)
1970 Mach1 428 w AC   = Eaton MC1280 (NPD 5310-7E)

Any/all PN and/or dimensional information associated with 1970 applications would be greatly appreciated. Thank you.

[67gta289]

Did you look in the MPC?  Example attached.

First picture is the part number/cross reference chart example.

Second picture is the application chart example.

This will list the springs that were serviced, not necessarily all that were used on the assembly line. 

[Angela]

Thanks John! No, I had not reviewed the MPC... thank you for the reminder.
I didn't immediately notice anything in the chart which specifies 8-1/2 turns at 15-1/8" length.  I'll keep looking, as well as triple check my measurements.

[RoyceP]

Like John said what the MPC shows is not necessarily the same as what was installed on the assembly line. The MPC simply shows what the dealer could offer for sale to fix your car if it needed repairs.

My experience, the assembly line springs - if they were not cut or involved in an accident or rusted - are restorable. The aftermarket coil springs from Eaton Detroit, NPD, Moog or where ever are normally too long and involve lots of labor to get the desired ride height.