Roller conversion??

[Fostang]

Is it possible to convert a 69'-72' engine to a roller set up?? What would be the the neccesary hardware to complete the project? What about the approximate price? The reason I ask this is because I have a block that has already been cleaned and bored that I was saving for a rainy day. It seems that rainy day will be comming sooner that I thought because my engine has started to make thumping noises when I start it. Plus it just doesn't seem to have the same punch behind it. Well any info will be greatly appriciated. Thanks in advance guys.

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67'fastback-Edelbrock carb,intake,cam,valve springs.Rhode lifters, CompCam rocker arms, windage tray,cerama coated headers,dual flows with H-pipe, modded c-4,tci stall converter,perma cool electric fan,aluminum water pump,griffen aluminum radiator,accel 8.8 cable,wide cap distriburator,magnetic pick up,v-matic hurst shifter,edelbrock performer nitrous, carter electric fuel pump,ignitor coil,solid motor mounts,magna racing suspension,poly urathane bushings,under rider traction bars, comp. eng. s