Closed chambers gone bad… that’s a wrap

madhatta360 said
Unfortunately pistons kissed the the 65cc SM heads luckily not enough to damage the heads.

These were the old speed pro high compression 340 style poking out the deck, ran the stock .053 head gaskets but just wasn’t enough. At this point I’m thinking of just having the lower end redone, going stroker route and starting fresh using the heads and 1.6 rockers I bought.

Luckily piston walls are good no scoring from what I was able to see but certainly will have it checked. Been a great learning curve not the outcome I was going for but **** happens.

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Haven't seen you post in a while good to see you again. Those are the PT 8553s and compressed they're actually around .046 to .048 ime.
You would want to use the 521 SD or 519 SD , whichever one is for the LA engine.. I forget... or if you end up with the Magnum version.. you just cut the captured push rod hold portions off with some cutters.
Those when compressed are .054-.056

Otherwise have the heads chamber milled