Another lifter question

I was looking at the Comp cams retrofit foller lifters. I didn't realize these were solid lifters. However, if I bought the MP 360 shortblock, which has a cam and no lifters, could I use these lifters safely?

Also, you guys that do have solid lifter cams, how often do you have to adjust the rockers? This would be for my 70 Dart (if I ever get it back together) which would be more strip then street except the nearest track is 70 miles away and I don't own a trailer.

Thanks