A Chevy 305 with a roller cam will have MORE power than a 305 with a flat tappet cam if both are installed in the same engine. The horsepower of any 305 depends on what all is done to the engine. Changing from flat tappet to roller will gain some. There are other ways to increase horsepower and there are other ways to increase torque.
It is a hydraulic camshaft, Not a roller cam. Chevy did not start using roller cams until late 1995
YES it does and it is a roller cam and hydraulic lifters.
If it's a HO then it definitely does, if its the normal one, you might not.
The 92 did not have a roller cam in it.
It could be done with high compression, big valves, and a roller cam, or a supercharger, or nitrous oxide.
Follow the recommendations from the cam manufacturer.
You do not want to change from a roller camshaft to a hydraulic flat tappet cam! that would be adding friction to you engine(bad plan). you can go from a flat tappet to a roller cam but no one offers a kit to erase technology, or subtract horsepower.
yes
The cams interchange.
It is in the Distributor.
yes I can.
If it has center hold-downs on the rocker covers, it's probably a roller cam.