Exhaust manifold down pipes needed

[tobascofred]

My '71 coupe has a 351M/400 w/C6 (yea I know, this engine was never offered in a Mustang, but it is what I've got to work with...)

I did not get the exhaust manifold downpipes with the car - can anyone tell me if the cast exhaust log manifolds are all the same on 351C 2V, 351M and 400 engines? I can't find anything that tells me that they are different and a 351M/400 is a 351C block that was used as the basis of creating a 1.09" taller deck block and used heads comparable to 351C 2V heads.

I strike out EVERYWHERE looking for 351M/400 downpipes but can find them for a 351C.

Any help is greatly appreciated.

tobascofred

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1971 Mustang Coupe

1965 Chevy II (just rebuilt)

2010 Chevy HHR

2011 Triumph Storm

 

[Tnfastbk]

Local muffler shop can make anything

 

[RacerX]

Since the 351m/400m is a taller deck block, the factory exhaust down pipes will be too short and wrong angles. The exhaust from a 351c-2v should bolt up and seal on the M heads. You will just need custom down pipes.

 

[tobascofred]

Thanks RacerX. I ordered a 351C downpipe / h-pipe last night and plan on eye-balling it and cutting it / splicing in a female-female connection to get the length / angle as close as possible to what I need. This car is a real challenge as it is such a hybrid with soooo many goofy things done by previous owners over the years. I will assuredly be asking lots of odd-ball questions over the coming years.

I had to make my own chassis perch mounts to get the engine bolted in properly -

http://dl.dropbox.com/u/45931257/chassis_perches.doc

http://dl.dropbox.com/u/45931257/old-mount.JPG

http://dl.dropbox.com/u/45931257/new-mount.JPG

I have gotten the interior work well under way - all floor rust cut out, painted with two coats of rust-neutralizer, two coats of rust-oleum rusty metal primer, floor pans replaced and two coats of blue enamel -

http://dl.dropbox.com/u/45931257/floor_bad_1.JPG

http://dl.dropbox.com/u/45931257/floor_fixing_1.JPG

http://dl.dropbox.com/u/45931257/floor_pass_patched.JPG

http://dl.dropbox.com/u/45931257/floor_done_1.JPG

http://dl.dropbox.com/u/45931257/floor_done_2.JPG

But it is all lots of fun!


ps - the engine and tranny were not bolted in when I had the car towed to my house - just shoved in and floating loose, to the point that the previous owner had actually caught the tranny tail shaft up in the emergency brake cable - there was about 5,000 pounds of pressure on the cable with the leverage of a 575 pound engine hanging out as a counter weight!!!

http://dl.dropbox.com/u/45931257/tranny_tight_cable.JPG

and nice dash as received....

http://dl.dropbox.com/u/45931257/bad-dash.JPG