Space between circlips and piston pin? WTF

[nd4speed]

I just installed a piston and there is a gap like .5 to .75 mm allowing the piston wrist pin to slide back and forth between the circlips. It's huge. The piston I just took off does not have this condition. I order the right pin for '87 but the piston is 87cheap old stock off ebay from White Bros. and possibly custom.

I dont think this is right and dammit it is stalling my project again.

So very little gap would be correct?

[nd4speed]

OK checked wiseco info and this 87 S513 wrist pin is actually longer than 88-92 S484. Wiseco piston.

The one I am replacing may be stock OEM. I just want to make sure because of the difference I am seeing between the two

[nd4speed]

These 1987 style pistons suck. Found a Wiseco page of instructions to drill holes for oil lubrication to the exhaust bridge on the intake side.

I measured the 87 and 88-92 piston and in conclusion: If you have an 87 top just buy 88-92 piston like Pro-Lite.

Anybody know anything about the Pro-X Single Ring High Dome piston for race only? Nevermind this was posted already.