X-heads or J-heads on a 360 LA Engine

Oldmanmopar said

68 -69 some early 70's had X/894 heads. Most 70's and all 71's had J / U/ O/ Z heads they were all 915 with 202 valves . All 72 8.5-1 340s came with 915 heads with 188 valves. If you are running a full factory exhaust the 188's are all you need with 9-1 comp. Are 202's better? I asked my wife she said bigger is always better.

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The early intent is to run headers, 2-1/2" pipes all the way back (maybe an H-pipe), 9.5-1 compression. I'm just starting body stuff so everything is subject to change but that was the intent when I started. I'm using the Edelbrock Performer and Holley 4160 600 cfm carb that was on the 318 in the Dart when I bought it to save some money.