Daughter had problems with car bought it 4 months ago no problem. I traced the problem to it needed a tune up. Removed cap and rotor.

Removed rotor and began to install. The top two screws in rotor no problem they tightened up. However the bottom one does not tighten seems to be stripped Tried backing it out to no avail.

Will it be ok if only two of the rotor screws are really tight

Madness

I agree that 2 screws will probably do it, but that sh*t always worries me. Not sure what pain is involved to pull the distributor out, but if straightforward, I'm thinking you could simply run a tap in that hole to clean up threads and put screw in without torquing way tight (blue locktite?). Alternately, maybe score a used on at the local pick and pull or eBay. Mike

Unfortunately, there is no 'distributer', just the rotor mounted on the end of the intake cam shaft. I believe the screw holes/threads are in the cam cover, but I would love to be proven wrong!

Blue loctite is a very good idea. Possible also is a strip of soldering wire cut length wise, if the threads on the screw look to be in good shape.

The new rotor should last 100-150K miles or so.
--
My name is Klaus and I am a V♂lv♂holic

Sounds like someone mis-threaded it during the install process. Can it work with only 2 screws? Probably, as they will hold the rotor tight. There isn't any pressure on the rotor, the 3 screws are there to keep the rotor at true verticle.

Re-threading the screw hole could be a real pain.
--
My name is Klaus and I am a V♂lv♂holic