Carb and head ???'s

not necessarily domed, the stock pistons have two sets of valve reliefs.... the pistons I ordered were 9:1 (assuming either no valve reliefs or maybe one set??) at 84 302 spec's, and with the smaller chamber on the 89 heads, I was just wondering if that would increase the compression and 600 cfm would be ok....

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Black, 84 GT, T5, ground effects, shorty headers, dual exh., rear spoiler from a 87.. In the works; 4:10's, 89 ported heads, edelbrock Performer, matched cam and holley carb (?? size)