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It sometimes helps if you disengage clutch with prybar etc, if it's that close to going in, just incase the clutch is not quite centered.



I second this , just because you THINK it's aligned properly it still may not be , I've done this many times before . Also it might be easier to install some long 7/16 bolts with the heads cut off in the top two trans mounting holes to help guide it straight in .