Bucket (solid) tappets

[Cody Forbes]

Speaking of solid llifters/tappets, I was wondering about some to replace 
the hydro ones in my MC. I just bought brand spanking new ones when I built 
up my new head with aftermarket (stuff as hell) valve springs and the Blau 
cam, but they don't seem to be up to the task of running into high rev's for 
anything other then brief periods of time. I usually shift arround 7250, but 
my limiter is at 7500 which I do hit sometimes. In an acceleration run as an 
example I can run to 7500 in first, then again in 2nd gear, but if I run up 
to 7500 again in third the lifters will bleed out completely and start thier 
clickety clack business for a few moments until they pump back up.

First off, are the older solid lifters compatible (MC1)? Second, this is a 
stretch, but does anybody know of "performance" hydro lifters that pump up a 
little stiffer? They seem to be the same as VW 8v motors (came from Worldpac 
in a sealed packet of 8, then two more in a ziplock baggie heh), which is 
not surprising at all knowing VAG's parts bin. I know there are tons of 
hot-rodded VW 4cyl cars so maybe there is something made for them that I 
could bennefit from.

-Cody Forbes
http://www.5000tq.com
'87 5ktq
'88 90 4cyl