Anybody ever eard of these pistons
http://cgi.ebay.com/ebaymotors/ws/eB...category=33623

I saw that on ebay today an I was wondering if anybody know these???
Are they good one or not?

I am starting looking to rebuild my 351m and I have the temtation to make it a 400!!!

 

Those look suspiciously like your basic, cast 400 "rebuilder" piston complete with low compression dish. The description reads "direct replacement for the higher compression flat top 1971-79 400 Ford pistons". While technically true these are quite obviously not flat top pistons so you won't be gaining anything C.R.-wise by installing these pieces.

Also since the stock compression height of the 400 is 1.647" not 1.630" like the seller says, it's another clue that these are nothing more than pistons which have a .020" lower compression height to compensate for any block decking the rebuilder might do.

 

You seem right bill_meyer, there are soo much stuff on internet that sometime it's very confusing. Some people like to make thing ambiguous.

Thanks for your reply

 

A factory 71 400 piston does have less of a dish than later pistons.

 

Yes the 71 400 pistons did have a small dish (+/- 8cc) but the pistons on eBay appear from the pictures have a much larger dish which looks a lot like a basic 72 & up piston. I'm not saying these pistons aren't worth $16 a piece but I think the seller is being a little bit deceptive about what these pistons really are.

My final words on the subject: Caveat Emptor.