074 aluminum heads
Does any one have any info on 074 heads that have a embossed area above the part number with a XX in it I have had many set of these heads but I do not remember seeing that before. Thanks
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69 RS SS L78 conv
69 RS SS ZL1
69 L78 Chevelle conv
69 L78 Nova
69 L34 Nova
67 SS Chevelle
73 Trans Am
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