grand marquis catalytic question??

i have a 92 marquis and it has the cat system that utilizes 4 cat
converters,two together right on both sides before y- pipe,the new systems
have done away with this now and only use one before y-pipe,question is the
garages want at least $300 per side to install,but quite a few parts dealers
including napa,pep boys and such are in the $150 to $200 range for direct
bolt on fit,at over $200 savings on the parts end of doing it myself,does
anyone know what would be involved or snags i would encounter? any advice
on getting the flange bolts loose or knocking them off or special tools or
technique needed?? money is tight and i kind of need to tackle this job
myself, thanks if anyone can help or offer advice, bob

robert -wanda fox wrote:
> i have a 92 marquis and it has the cat system that utilizes 4 cat
> converters,two together right on both sides before y- pipe,the new systems
> have done away with this now and only use one before y-pipe,question is the
> garages want at least $300 per side to install,but quite a few parts dealers
> including napa,pep boys and such are in the $150 to $200 range for direct
> bolt on fit,at over $200 savings on the parts end of doing it myself,does
> anyone know what would be involved or snags i would encounter? any advice
> on getting the flange bolts loose or knocking them off or special tools or
> technique needed?? money is tight and i kind of need to tackle this job
> myself, thanks if anyone can help or offer advice, bob
>
>
ford engines have a bad habit of RUSTY manifold bolts where the exhaust
bolts to it. usually need a acetylene torch to heat them to get them
unseized.