I hope not, a lot of them out there and running just fine. I think getting as much info as one can before building is important, what has worked and not worked for others. If I'd known about all the problems with these lifters and rockers before I started I would have gone another route. Oldsmobile guys have had trouble with them as well, same part number and the Pontiac. They may have things worked out now with a different manufacturer, but I've been bitten twice.
