You must to have solenoids in place if you have MDS lifters.

If you remove the MDS lifters, then you can remove the solenoids and install block plugs.

1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi
2020 RAM 1500
[img]https://i.imgur.com/v9yezP9.jpg[/img]