Here are some Rockwell tests I did today
Used FoMoCo                 = 53C
Used FoMoCo Steel        = 57C
Trend                               = 62.5
Sealed Power HT 892 B = 60C 
Erson                              = 56C

Muskegon = 55C

FoMoCo EAA6500 D =54C

Wohlerts # 1085JX = 56C

Melling Chilled Iron  = 59C

EPW  I tested 3 of these 52C 53C 56C

Can you explain for the peanut gallery what the process is?

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

According to your test results, the Trend lifters are the hardest. However, is that necessarily a good thing? At what point will lifter hardness cause premature/excessive cam lobe wear? Also, Trend does not list Y-block lifters on their website, only Ford Windsor lifters. I've had confirmation that Comp Cams, Clay Smith, and Isky Y-block lifters are all made by Topline Hylift Johnson. Is Topline Hylift Johnson the only American manufacturer of Y-block lifters?

Hi, there has been a lot of talk about soft lifters, so I tested to find out, the Rockwell tester measures the hardness of the metal and it looks like there are good lifters and some not so good, the older FoMoCo were soft, the FoMoCo steel are good, the surprise to me was the Sealed Power there the ones that were supposed  to be soft but are the best cast lifter (hardness), I have more to test when I have time and I will be testing camshafts FoMoCo and aftermarket to see what's up, this may not be for everyone but no one wants a flat cam because of a poorly made part. 

Trend lifters have been proven to be the best lifter you can buy for a Y Block Ford, you can use them over and over switching cams and using them in other engines without refacing (they do not wear), that's what's in my Dragster engine (180 lbs seat pressure), however overkill in a low H/P street car