Large Bore 4 Cylinder Pistons

[pkhammer]

  I have several boxes if these aluminum McQuay-Norris pistons, p/n P668AX and P669AX. They are for a 4 1/4" bore size so they are for a large displacement 4 cylinder. Being McQuay-Norris I don't think they could be newer than 1960s? After doing some searching the only 4 cylinder automobile engines that I can find with that large of a bore is White. Maybe I can convince Ed @edinmassthat they will fit his White(s). I can't find anything on the internet about those part numbers.

[1939_Buick]

Tractor -  truck?

[BHWINCVAP]

They are 1959 Tbird 430 ci only

 

668AX Is RT Bank pistons 

669AX is for the LH Bank

Edited November 15, 2021 by BHWINCVAP (see edit history)

[pkhammer]

Interesting information! I was looking at 4 cylinder engines since I thought these were only sold in full sets. 

  THANK YOU!

[BHWINCVAP]

LOL 4 pistons is a set (for one side), I think I may have the mates for them. They are odd balls seeing as they are for 59 only.. Differrent #'s show up for 1960

[pkhammer]

I have had a number of eight cylinder pistons go thru here but being in sets of four is a first for me, they have always come in sets of eight. Hoping to find someone that can use them. A home for wayward pistons perhaps! LOL

[BHWINCVAP]

your pistons are also correct for ,

1958 & 59 Lincolns with 430 .

1958-59 Mercury with EDJ Engine. 430 Cu.

Edited November 15, 2021 by BHWINCVAP (see edit history)