3100 vs 3800 buick heads

57TurboVW

Will TURBO anything
Joined
Jan 10, 2006
is there a differance in the exhaust port spacing between the 3100 and 3800 buick motors? I just fabbed up a pair of turbo manifolds for a 3100 and now a guy wants me to do a pair for a 3800. I was hoping to use the same jig is this possible ?
 
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