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Discussion Starter · #1 ·
will a rug c 2 toploader fit a mustang. it decodes as a 67-69 close ratio 390 transmission from a montego, ranchero or fairlane. what is the advantage of running a wide ratio compared to a close ratio.
 

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It will fir a Mustang. Keep in mind however that the input shaft snout differes between the big block and small block toploader. The former being 9/16" shorter that the latter.
 

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IIRC, the wide ratio had a 2.78 1st gear while the close ratio had 2.32. The 2.78 box is better off the line, combined with your rear gears. The close ratio will minimize the drop in RPM during shifts, the wide allows the engine RMS to drop more between gears. Again IIRC, close ratio was better for racing, wide perfectly acceptable for the street.
 

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Got that exact one in my Mach 1 with the wide ratio, etc. No issues except the PO forgot to put the reverse light linkange in there and I need to figure what I need, etc.
 

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Two Toploader specialists sell "modular" input shaft kits to change from BB to SB input shafts.

Google 'Dave Kee Toploader' and 'Dan Williams Toploader' and you'll find them.
 

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If you want to use a smallblock trans with a bigblock fe all you have to do is use a bellhousing from a truck. That will make up the dif. in the length of the shaft.
 

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Discussion Starter · #7 ·
I have been running a smallblock toploader behind my fe and i did not realize a length problem. i have the cobra jet bellhousing also. i have never had a problem, but maybe I have been lucky. The present tranny I am going to run is a rug bj1. How do you tell there is a problem. Thanks for all the info guys.
 

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You may want to check it out. Friend of ours knocked the thrust bearing out of his 428 in his shelby. Had the crankshaft pushed forward and ate it up.
 
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