I haven't posted here in awhile but always willing to help an A & C owner. I've run a Tilton hydraulic bearing since 2000. I've never had a problem and the car still runs great. Take your time setting it up. Their tech is top notch.
By the way, my gelcoat still looks like a paint job. Buff it yearly with stuff from a boat store. Had a bit of a blemish recently. Managed a little crush at the air intake; about 1"wide and 1/4" deep. Bought the gelcoat repair kit from West Marine (3m Product) worked great. I'm at the point of finishing sanding (600 grit then 1200) and polishing out with 3M compound.
Although my build site has not been updated for years (I'm driving the car) it may help you in your build.
Http://www.priveye.com/cobra.htm
Roscoe