89 360 vs 71 360

If you want to build a hydraulic roller engine that gives you no problems and uses Factory rollers and spider which are good for .600 lift on any aftermarket cam...then use the '89 360 block, it's perfect for you.

If you want to build a flat tappet motor or solid roller... the '71 360 is right for you.
Can you do the same with the '89 block? Yes...but it's perfectly setup to 'successfully' run a hyd roller.