Be very thorough cleaning any metal filings or swarf from the parts you have cut!!!
I cut and moved my intercooler pipes once when building my old 300bhp xr2 turbo, cleaned all the filings and flushed the cooler with a hose etc and it looked mint, no swarf anywhere..........
Until i got it mapped and it had 2.5 bar of boost through it and it blew out loads of swarf that was stuck in the cooler fins i didnt see or know was there, went into the intake, into the head, jammed in the valve seats, snapped 2 valves, holed 2 pistons and ruined the head and block
< real tears
That engine was 6 miles old and cost 3k to repair nearly
, expensive lesson learnt