’89 LA 318 Cam question

I have a roller cam, 302 head 318 in an 89 dodge P.U.. I am doing a rebuild & want to upgrade & eliminate lean burn. Pistons are easy - KB167, Summit headers, Mopar electronic ignition w/ orange box. The problem is the cam. I think that I read, somewhere..... how to change the roller cam to a flat tappet cam, However I cannot find that info. I know that the push rods have to be changed, & i think it was either the Jeep, or the AMC lifters that had to be used. Any help would be appreciated. I need specifics not guesses. Thanks.
Author: D-cat