i just found out i have only 100 psi compression on cylinder #8 ,all the rest are around 125.it has been smelling like gas lately,but started a hard skip yesterday.i guess i know why the previous older sold it now.i can rebuild 302's and 351's,but this monster scares me.can anyone tell me what years are close to a 97 4.6 DOHC in a mark VIII,and what i can use off it,such as shortblock,heads,intake.i would greatly appreciale any help you guys can give me.thanks,mark.