Rebuilt 727 no reverse took off pan help

A shop? Yup, that's why we are so willing to help folks rebuild their own. You could rebuild it for 1/10 the cost and probably not screw it up any worse than they did. You can get the strut in without dropping the trans; just the valve body, then back off the adjuster enough to get the strut back in. You'll need three hands...or maybe a pair of sideways needlenose pliers.