Need help transferring 74 block parts into my new 89 block

toolmanmike said
They look like 915's. A 340/360 head with 1.88/1.60 valves. They did use that casting number on the TA heads as well with a 2.02 intake valve. #3418915

Yea I was told they were J heads, quick question if I want to use the hydraulic roller set up would I have to get new heads