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Clark's Ultimate Exhaust [ header] -Lower Shrouds?
Posted by: persh ()
Date: December 26, 2017 07:43AM

I am not making much since of the template that came with these headers for cutting the sheet metal so I can have thermostats and a working heater.

Has anybody done this successfully? Any pictures??

Thanks,
Van



Edited 1 time(s). Last edit at 12/26/2017 11:06AM by MattNall.

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Re: Clark's Ultimate Exhuast-sheet metal
Posted by: cnicol ()
Date: December 26, 2017 07:52AM

I didn't follow the template but rather cut the shrouds front-to-rear along the centerline of the exhaust tubes. Then I started cutting each shroud half to fit around the pipes. Once all the trimming was done, I made tabs and riveted them to one half along the seam and then connected the other half to the tab using screws.

This all worked like a charm for 20-years. I'll see if I can find any pictures but I not recalling that I do.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Clark's Ultimate Exhuast-sheet metal
Posted by: SoloCP ()
Date: December 26, 2017 07:53AM

I had one years ago, someone had very carefully cut the shrouds to fit on the headers, then had taken header wrap cloth attached with stainless steel pop rivets and went around the cut outs to provide a good seal. I could imagine the time involved, it did work great though.
I would suggest that you do a basic cut out then use a small die grinder to complete a tight fit. Definitely a slow and tedious process to get a good fit.

Don
Kansas City
HACOA
Broken Halo Corvair Garage.
61 Lakewood
62 Monza aka (Flicka)
62 Rampside
63 700 Sedan 3 Speed
64 Spyder Coupe (Bill Pierson Car)
64 Monza Convertible,140/4 Speed,Electric Heat,Kelsey Hayes Wheels
64 Spyder Blown, (Dave Bolduc Car)
64 Monza Convertible 110/Auto (Future Project)
65 Corsa 3.1 Liter Triple Weber (aka Unsafe)
65 Corsa 140/4 Speed with Triple Weber
66 Avenger, Corvair Turbo, Fuel Injected, Air to Water intercool 140. (Michael Mann Car)
67 Monza 110 Auto. Sugar Bear

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Re: Clark's Ultimate Exhuast-sheet metal
Posted by: persh ()
Date: December 26, 2017 08:27AM

Thanks for the input. The templates are basically useless so I'm going to do the cut-down-the-centerline approach. Years ago I modified some tins to fit on a set of Otto headers that I was using at the time and that was much more complicated than this will be. I was just hoping that someone had figured out the Clark's templates to help make life a little easier.....

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Re: Clark's Ultimate Exhuast-sheet metal
Posted by: BobV66Vair ()
Date: December 26, 2017 10:17AM

You might use a hole saw to cut the holes before you split the tin. That will give you cleaner holes that can be as tight as possible to the size of the pipes.

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Clark's Ultimate Exhuast-sheet metal
Posted by: persh ()
Date: December 27, 2017 02:48PM

After a kind note from Steve G. and re-reading the above linked article, I dug out the modified tins I used on my old headers and gave them a try. They worked perfectly. A little tweak here and there and now I have a heater!!

Thanks for all your input.

Van

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Re: Clark's Ultimate Exhaust [ header] -Lower Shrouds?
Posted by: steve c goodman ()
Date: December 27, 2017 03:29PM

And if anyone wants to look at Van's handiwork
open Nov 2000 COMMUNIQUE for 2 pages of pics and
instructions.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo---1965 Crown V8
1967 monza 110/4---1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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