Posted by DJ in WA [18.104.22.168] on Tuesday, June 02, 2020 at 02:00:40 :
Searched a little, didnt find previous discussions: Replacing a 1964 225 with a 1970 225 in a 64 D200. Keeping the 64 hydraulic-clutch bellhousing.
I was aware the diameter of the flywheel center-hole/crankshaft-end was larger starting in late 68.
But we also found that more relief is cut in the 64 flywheel to clear the interior of the hydraulic-clutch bellhousing. The 70 flywheel would not fit - checked a flywheel from another 70 slant six/4spd combo just to make sure.
Other than increasing the diameter of the hole in the 64 flywheel to fit the 70 crank, it looks like the best option is to use a 318 flywheel (which has the same dia hole as the 70 slant six crank), and deal with the one bolt hole that is spaced differently between v8 and slant 6 cranks ... ?
I had heard that a 70 slant six flywheel would install in the earlier hydraulic-clutch bellhousing. (Warning - Conjecture Ahead) Now I wonder if for the intro of mechanical-clutch/larger-crank-end slant six configurations, maybe dodge just honed out the earlier flywheel to fit until they used up inventory and moved to the newly designed flywheels. (?)
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