Are there any things to be done to the 3800 S1 exhaust manifolds while I have them easily accessible? I haven't taken them off the motor yet, and won't risk breaking a manifold bolt off if there's nothing to be done.

I'm thinking along the lines of the old 2.8L manifolds that could be hogged out..

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When life hands you lemons... Ask for Tequila and salt.

'85 SE V6 4-Spd: Mild upgrades
'85 S-10 Blazer: 350 conversion
'78 Corvette: ragtop conversion
'52 Suburban: IFS, AWD, ABS, EFI, etc..

My 3800 in my 88 gt has a Fiero Y pipe welded on the 3800 Y pipe. Works well.

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86" TARGET=_blank rel="nofollow">http://www.fiero.mn.org

86 GT, 18" wheels, GA CD brakes, ST brace, Leather, 3800 Supercharged,DVD
88 Formula 5 speed T-Top stock,
88 GT,Leather, T-Top,S1-3800