Need machine shop
Any advice will be helpfulL
i took my 5.3 to ls spec like you are talking about i did the bore in 2 steps to allow proper cooling time and not to warp the hole
when i set it up for finish bore it did taper a little bit but still in spec to straighten out during the 4 step of finish bore
someone else i know took the whole bore in 1 stroke and found out the hard way as to how these units do warp
just my 2 cents...........
i did all my own work on the machineing process





