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I was measuring the bolt pattern on my T10H tonight, and discovered something very odd...the second pattern isn't the Muncie design...I really don't know what it is. The main pattern is (I think) the old Ford "tall and narrow" standard. The second pattern is a rectangle, 8.5" hole spacing horizontally, 6.25" hole spacing vertically. The bearing retainer diameter is right around 5", and brushes the top of the secondary bolt pattern. Without some more measurements I can't be positive, but it doesn't look like the ears are designed in such a way that I could redrill it to the Muncie pattern.
Input shaft is right around 6 1/2" - 6 5/8".
I have a 14", 168-tooth flywheel that I'd like to use.
Anyone know where I might get such a beast, without ordering a $350 Lakewood scattershield?
agreed, 621 was the usual C3 bellhousing with the 14 inch 168 tooth flywheel
The 403 was normally used with the 12 3/4 inch 153 tooth flywheel and will not work with the larger flywheel
Batman, read bernies post abou installing a t-5 in his corvette. with the od 5th gear I think you would be better off.
That's the eventual plan (or more likely, a T56). Right now the T10 is in hand, the TH350 has a small leak, and I don't want to screw around reconnecting the TH350's cooling system since I'm replacing the radiator.
I've seen some GM truck bellhousings with a huge mounting pad. I wonder if one of them would have enough meat to drill for one of the other bolt patterns...