I used the parts washer on the intake manifold and valve covers when I swapped cams but I can't remember if I did the TB, I think it looked clean so I didn't bother.
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1989 IROC-Z 355 LT1 T56 Swapped
2016 Chevy Colorado LT 3.6 v6
2008 Jeep Grand Cherokee Laredo 4.7L RIP 12/29/2016
1998 Honda CBR 600F3
2003 Yamaha FX140
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