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OK the '68 (&'69) 318 pistons are the 9.2:1 c.r. valve relief flat top pistons that came with the Full Floating Rods.
The '72 rods are more than likely the pressed on pistons. The '89 to '91 318s had the full floating rods that will work though, as an alternative source.
Full Floating Rods: pistons install with the snap rings.
'69 318 factory 9.2:1 pistons pictured here:
'90 318 9.2:1 full floating pistons/rods pictured here on this roller engine:
OK the '68 (&'69) 318 pistons are the 9.2:1 c.r. valve relief flat top pistons that came with the Full Floating Rods.
The '72 rods are more than likely the pressed on pistons. The '89 to '91 318s had the full floating rods that will work though, as an alternative source.
Full Floating Rods: pistons install with the snap rings.
'69 318 factory 9.2:1 pistons pictured here:
'90 318 9.2:1 full floating pistons/rods pictured here on this roller engine: