1) I wouldn't worry one bit about the weight of a new piston. It'll be 'close enough'. Balance is a greatly misunderstood topic when it comes to reciprocating engines.

2) I recently pressed out the pin on my Six and used a Dake press. I can tell you from experience that it took around one ton of force. I made no effort to protect the pistons skirts - they were sitting up against the steel bed of the press - and they were not damaged. If you did want to reuse the piston, you could cushion it with some wood and it would be fine. You could even make a puller with some 1/2" all thread that would suffice, if you don't have a press.

3) Don't know where you live but in most parts of the world there is a machine shop that has an electric or propane heater that is used for piston pin fitting. It's cheap.


It might cost a few dollars to replace the piston but it'll cost you way more to pull the engine back out and go through it again if the ring lands give up 300 miles down the road.

a good rod+piston (standard size) or two,

the pressed fit piston pin

says +060 at the top of each piston

I bet I can find a good rod+piston (standard size) or two, and send them to you, if you can figure out the shipping procedure... Please verify the engine has not been overbored, and please send the date of the block.

Lou

and so it is,,,,,although slants can be bored larger than .060

if it was me, and I was doing a very low dollar repair I would:

1) check all six pistons to see how easily the rods swing, no hang ups would indicate that the pin bores are still round
2) remove what remains of the rings on all six pistons and the bearings from the rods, if plans include re using the bearings, mark them so they go back in the same rod, top and bottom
3) clean the pistons - rods as an assembly, use a solvent, some fine steel wool, follow up with plenty of hot water and detergent, dry thoroughly especially the pin bores.
4) visually inspect the pistons, use a light, magnifying glass, look for cracks, check the ring grooves with a piece of broken ring, see if they look uniform
5) if the pistons pass #4, take them to a machine shop, have them checked for cracks in the ring grooves using dye penetrant, and ask that they check the ring grooves with a gauge pin or inside mic for width and compliance to ring width specifications.

if all seems good, it probably is and I would re use the pistons with new rings, go through the bores with a ball brush.
And be sure to resolve the cause of the detonation.

Which piston?

Anyway to determine if it was an intake manifold leak leaning out the mixture for that cylinder?

...this whole thing wasn't something I prepared for....