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as I was searching my local pic-n-pull for a fresh set of louvers for my 240 (w/78 hood) cuz some lazy jackass pried mine off the other day. Anyway I ran across a 72 with the head removed and noticed some odd looking pistons, they had #75 stamped on them and valve "cut outs"...What does it mean, if anything? Should I go back and pull em? They appeared to be fresh, no carbon deposit, I wish I would paid more attention then, like noting the block, but I didn't, and now I cant seem to forget about those pistons...can anyone one tell me what I saw?
BTW, I found a set of louvers, albeit they'er missing some bolts...epoxy time---Jerry
 

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Jerry, The # 75 on top of the piston is / means .75 mm . Another words it is an oversize piston with its oversize in millimeters stamped on the top. Interesting though, most import pistons are this way. Most American made pistons have it in thousandths stamped on top. .75 mm eqauls .030 thou. Worth a second look though. Craig
 
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