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Reply to "Identifying Cleveland Heads"

Lots of 4V heads have been machined for studs (adjustable valve train) over the years. The Boss heads were also machined for spring cups, not as many people duplicate that so if the head is machined for spring cups there's a better chance it may have originally been a Boss 351 head.

Below is a picture of a Boss 351 head, unused, still in the box. Notice the springs pads around the valve guides are machined flat.

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  • boss_351_head
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