Thanks for your quick response.Sorry if I posted too many pics., but I thought some one else could compare and reference with them .My heat ex changer was rusted shut.....Thank you.... I changed a lot of gaskets along with some broken exhaust bolts.I used every thing to break the shaft loose and I think the torch and wax was best.With a pipe wrench,slowly,don't get to discouraged.Stopped the noise but it was fatigued point spring that was cracked and would cut out when reved up, and smoked..Feels good to overcome different problems,even thought I'm not a good mec. It's ready to drive.100,000 mi. and very little smoke now. Ins. will be super cheap...$175 a year,full coverage for $5000 RIG.