Hydraulic Roller Lifters w/LA Block?

Yeah.. I'm pretty sure he said I could keep my current hydraulic roller cam and just use it with solid roller lifters instead. Of course to go solid I'll also need to get adjustable rocker arms and new springs/valve train components so it's def going to be more expensive.

What kind of valve train did you pair with the MRL's?

You can run solid rollers on Comp Cams hydraulic rollers. My Valiant has a Comp XFI hydraulic roller with solid rollers. It's a little noisy and you have to keep the lash tight (.006" - .008" hot), but it seems to be fine. For more info on it, Google "427 Valiant", I didn't build it.