Which piston stop to buy?
 

Anyone know which sparkplug piston stop I should pick up for my 400sbc?

Milodon. I bent my Comp one with almost no force.

I made mine using an old plug. Knocked the porcelain out of it, ran a tap through it and threaded in a rod with two nuts on the outside.

Trick is to turn the motor over gently by hand. If you were to bend the one I made, you better be worrying about the top of your piston lol.

Seeing as this got moved from my project thread I updated the info. I'm looking for a part number or size.

I also tried googling for the milodon with no luck. Making one is way too much effort for something that costs under $10 shipped.