Hi integrated . . .
Yes if you look closely at the 1957 parts master pages (right click View Image to see a larger pic) you will see that the 50-53 Power Glide cars all used forged steel cams. The lifters shipped from 50-52 were GM part 5230650 while the lifter for 53 was GM part 5230850. Both had chilled iron bases. In 54 Chevrolet introduced part 5231450. This softer faced hydraulic lifter was designed for use with the new cast iron cams. The aftermarket cross reference is Clevite 213-1630, Johnson A761, TRW VL6. Again even the older GM part numbers collapse on the VL6 in the cross references - but I think it's doubtful that the aftermarket ever shipped a chilled iron hydraulic tappet for this application. The replacement cycle is always years later - and the transition to cast iron cams would have already have been well underway . . .
stock49
