[QUOTE=Steve C.;6495765]I suspect the OPs UltraDyne solid roller cam consists of lobes R79 & R80 listed here:
https://www.bulletcams.com/Masters/u...nemasters.html
276/284
243/251
162/170
.3883" lobe lift
If this is correct I used the same series of lobes 29 years ago in a 412CID combo.
Keeping in mind at that time they were 30+ year old lobe designs.
The cam card stated .026" lash (hot) based on a 1.5 rocker ratio for both intake & exhaust.
That's correct Steve, and with the information guys have shared in this thread, I'll stick with the old reliable
UD/Crower hippo combination. However lash is .026 intake/ .022 ex. hot setting.