Hi, saw an ad in the national dragster that ultradyne is back. Is this true and harold is that you again??

No, not really. Bullet cams now owns the rights and probably the master lobes from the older Ultradyne cams.

To the best of my knowledge, Harold is still working for Lunati.

They have been back in bussiness for a few months now as John Partrige from Bullet Cams owns them now and Tim Goolsby from the old Ultrdyne is running it now.

That is all true, Bullet bought UltraDyne, and Tim went to work for them. They have all the old UltraDyne masters. Who will be designing any new cams they have will be Lunati's old cam designer.
It's just like Lunati and UltraDyne swapped cam designers.......
Everytime I design a new cam, I try to make it better than I could have designed in the past. The VooDoos are proof, and the new racing cams I am working on are more proof. My new VooDoo 285 solid roller is 285/293 at .020", 255/263 at .050", 178/184 at .200", .400"/.400" lobe lift, and 110 LSA, for .020 timing of 36-69-81-32.......
My old UD 288/296 was 255/263 at .050", 176/183 at .200", and .4176/.4176 lobe lift.
My new 288/296(at ,016"!) is 255/263 at .050", 180/187 at .200", and .4164/.4164 lobe lift, and it is available now---I've had the masters since the 1st of December.

UDHarold