Non roller lifters and cams have been failing at an alarming rate over the last couple of years. Some say it's the
oil, some say it's the low quality lifters. Some say it's improper break in. I think it's a combination of the first two. The solid lifters may be a higher quality than hydraulics. You don't hear of so many failures. But so few people are using them, it's hard to make the comparison. But since you already own them, it's not really an issue.
Lately I'v been thinking of adding a solid roller to my engine. IMO, if you're going to step up to a solid lifter, it doesn't make sense to use a non-roller. As you build the engine, there are a few things to consider.
First, of course, is always the cam gear. This goes with almost any camshaft you install. Just make sure you talk to both the cam maker and the distributer maker to ensure you're using the right parts. That can get tricky, because sometimes the tech line is wrong and the company won't admit it. But do your research there.
Second, most solid cams are fairly radical. Even those that are referred to as a "Street Solid Roller" have pretty long duration. Might be more than you're after in drivability.
These big cams have a fairly late intake valve closing point. That can really drop the effective cylinder pressures. To comensate, you'll need to have a static compression >10. If you live at altitude, it would have to be >11'ish.
You have to set valve lash at regular intervals. In theory, once it's set properly it's set for life. As long as the rocker arms are torqued and locked, it should never move. In reality, as parts wear you'll need to re-adjust. But that's not very often, maybe once a year.
You need to be sure and use the proper matching parts: Pushrods, springs, retainers, etc. The springs have considerably more pressure than a hydraulic part. You'll need a more robust rocker arm and pushrod. You should really consider titanium retainers and keepers. It makes a differance at 7,500 rpm's. I prefer to get them all from the same company, like Comp Cams.