there is a company Cam Research that breaks in Ford Cams for around 85.00, they have a fixture that you put the cam and lifters in, and as they run it, it floods with oil and they increase the spring pressure. If this works, it would seem like a no brainer compared to running the engine with the outer springs only, then taking apart and putting the inners back in. has anyone heard of a company that does this for BB mopar cams?

It sounds like a good idea but with variances in castings, lifter bore wear etc I don't know if it would be a good idea or not.

I was always told not mix used lifters from cam to cam, so they would have to be keep as a set, plus geometry angles etc would have to be the same
?...

It wouldn't take much to set up and old engine with an electric motor in place of the crank,an oiling system, and some weak springs.
How much variance from engine to engine is acceptable though?

i believe the variance issue has been discussed before, but if the acceptable numbers have been agreed on, or even mentioned, i can't remember. also, has anyone ever seen the ford "fixture" or pictures of it ? what is it made from/out of ? how much flex could it possibly have at "?" temperature and "?" spring pressure ? how much flex does a typical camshaft go through with the "average" engine block at typical temperatures and has varying valve spring pressures been measured at these levels ? the concept is interesting to say the least, but in the few times this topic has been brought up, i think not much has been agreed on other than it might not work due to block variances with the lifter bores. any "real life" answers out there ?

Run a roller. Problem solved

I think you guys are making more out of this than
needed.. havent any of you changed blocks and used
the same parts into a newer block.. I know I have..
I just kept the lifters on the same lobes.. ran that
engine for years
EDIT
and those were both a hyd and a FT cams

If you search on youtube "cam king" you will see the video of the cam breAk in procedure on the machine

i have even installed a used cam with used lifters on unknown, correct lobes before and not round a lobe off. this installation was done "just because", and nobody was concerned weather it lived or died. surprisingly, it's still going strong 3 years later. just one of those deals where if you don't care, it goes forever. this particular cam only had 484 lift and unknown duration, plus it used springs of unknown [more than likely wore out]pressure. also had a 74 plymouth 318 that punched a push rod thru a rocker, causing the lifter to come apart and lose those internals inside. just plopped a different used lifter and rocker in, used the same push rod , and the thing ran almost 40k more miles till it was junked. forgot, both those examples were hydraulic flat tappet cams.