You may well have another surprise lurking in that Dynaflow crankshaft. If I recall correctly, you can't just bolt a manual trans flywheel to a crankshaft from an engine that had a Dynaflow originally installed. I believe the diameter of the bolt pattern is slightly larger on the manual transmission 263 cranks than it is on the Dynaflows. Have you been able to bolt your 248 flywheel to the crankshaft?
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