Which heads can I use on my 86 w/stock pistons?

[Chevyguy]

Car craft recently did a 600 HP buildup on a 86 GT 302 they yanked from the boneyard. They detailed grinding in valve reliefs into the flattop pistons. This goes back about 3 months or so. They did the clay marking then drew the pattern on the pistons, and ground out the releifs with a die grinder with the pistons still in the shortblock. The motor survived a 600+ HP NOS shot about 400+ on the motor

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Frank W
90 5.0 LX coupe Stone stock soon to be daily driver
74 Chevy Laguna Type S-3 305 apart in garage, getting a 454 to put next to it
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