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I just unearthed a new Mopar Performance single bolt roller chain & sprocket set (P4120264) in perfect condition except for the 20-year collection of dust on the outside of the package. I went to check on what this was selling for and I can't find it. An interweb search turns up a couple...

I dug out set of custom Ross pistons in response to a 'Wanted' thread here and I believe he passed on them, but it got me to thinking, why did I get these in the first place? They are pop top slugs with a 4.28 bore but a compression height of only 1.732. Wrist pin hole uses a stock big block...

Digging around the back of the shop & I found a new set of K-Motion K-850 dual valve springs. I'm thinking about using them with a MP aluminum Hemi head & 238/249 @ 050, 520/511 lift SFT cam. According to the catalog, K-850s are 135# @ 1.900 installed & 419# @ 1.250 open. Anyone have real...

Does anyone have the .050 duration numbers and LSAs for hyd roller cams P5155620 & P5155621? Everyone has the advertised duration & lift specs but I'm trying to compare apples to apples with a few other cams. A link would be awesome but any assistance would be greatly appreciated. Thanks.