I have 2 sets of 86mm Mahle Pistons to use in my new LET engine and im not sure which ones to use. Here is a photo of one piston from each set.
As you can see i haven't even cleaned the one up on the left at all lmao . Only just pulled it out of the block . The other one aint been cleaned up much either lol.
They both have this writing on the bottom of them...
Which set do you reckon i should use, as the set on the right got a bit damaged after a valve bending experience .
Also there is a bit of a lip on the top of the bores on the new block i bought. What do I do about this? Rebore? If so do i have to ditch both sets of pistons and get larger ones(which i cant really afford)?