So just finished buying car about month ago and was planning to take it tracking. Well...... that's been postponed by a few months maybe. Hopefully weeks. So the previous owner has had the block rebuilt. (Was never told this). I started fixing the basics, lines,fluids, brakes etc. well when I finally got it running I realized that it was getting to much blow by. Did leak down test and compression test.all pistons were at the 15% leak And piston 2 leaked oil. So finally took apart head and it was fine. Not a single problem. Looks clean. The inside sleeves where all scuffed and damaged. So now I'm rebuilding the block. I took it to machine shop and the guy had told me that it has already been worked on before and it was bored out to max. He said no one makes pistons that big for it. He looked around and apparently wiseco makes pistons bigger for the size I might need it would be bored to 1.5 I believe. This is where my questions come in. Is there a downside to this? It's being bored more than normal. Will this make my block more brittle? On the pictures I have a list of parts that I would be installing. Beside the pistons. The estimate was made before he actually looked at it. So is it worth rebuilding block. It's really hard to find parts out here in socal and no postings on dsm for LA region. Any advice on what can be done or should I just go through with the build ?