Are all on center housings the same size? I don't mean the actual turbine but the overall physical size?

I have a T40B P-trim .60int/.81 on center exhaust. Is this housing the same as a 60-1 or a 62-1? I would like to install my current turbo but then install aforementioned turbo once the new engine is built. I don't want to have to make a new downpipe when the proper turbo is installed.

 

Anyone? Anyone?

Would someone with a 60-1 like to take some measurements for me?

 

i'm confused.....you first ask about exhaust housings but than say something about the size of the compressor housings

Which is it?

Then i can answer your question