well i was looking around in my area for a supercharger for my v8..and this came up.a 3.8 pontiac supercharged motor for 650.bad headgasket..now i know we all love MC's and the top swap seems common for the 3.8.so i figured id post this up and let you all know..idk if 650 is spendy or not,idk what they go for..here it is

98 pontiac 3.8 w/supercharger motor---blown headgasket

this is a portland,Or posting