Sorry to hear about the screw. It maybe on top of the trans but with the coil plate & coils in place ya can't get an eyeball to the right angle to see back there. Also there is room under the starter for it to hide if it bounced that way. I hate to say this but it might just be easier to pull the coil platform & then look to see if that helps...at least ya can see the trans top & sides with it out of the way. Then I'd look straight down from the fuel block to see where or what it could bounce off of & go from there. The starter is next if ya can't find it because there is room under it for lost screws to hide. Ask me how I know
I'm not laughing at you, Bob. Remember I had to pull the passenger side fender panel to locate one of my fumbles. Oh yea I found some interesting things on top of my trans too & I didn't even drop them there!
btw how is your breather box? Check the bolts. Mine were only finger tight! If there is anything I can share please shout at me!
Good luck!
Tom