exhaust for 650 lario engine

[pitts12driver]

I apologize in advance for this completely naive question.  I'm rebuilding a Lario for a friend, and have sorted out all the mechanicals.  What I don't know is what exhaust will fit at the exhaust port besides the pipe specifically for this model, and how specific any other options are to displacement??  Can I use an exhaust from a modern V7?  Can I use an exhaust from a 500?  I don't want to use the stock Lario pipes if I don't have to. Thank you for any guidance.

[Muzz]

Out of curiosity, what was your solution to the valve and springs problem?

[Matteo]

V50III with Lario exhaust system.

[Kiwi_Roy]

I like the black pipes on my Lario, I guess you are looking for more bling?

[Tom]

For clarification, you're asking about the header pipe to the exhaust cans/mufflers?

[pitts12driver]

Actually, I'm looking for less bling.  Want to create a simple 2:1 that tucks under the oil pan.  So, yes, I'm interested in header portions I can work with/weld on - not the cans.  Thanks everyone for guidance.

[Chuck in Indiana]

Actually, I'm looking for less bling.  Want to create a simple 2:1 that tucks under the oil pan.  So, yes, I'm interested in header portions I can work with/weld on - not the cans.  Thanks everyone for guidance.

Ok, I'll go get my calipers. Got a picture of that Pitts 12? I built a S1S..uhh..34 years ago. 

[Chuck in Indiana]

 Checked the diameters, and the 500 exhaust will definitely not work. If you are going the full Monty with the exhaust, why not just buy some 1 1/2" tubing bends and fabricate your own exhaust?
When you say " have sorted out all the mechanicals. " just what did you do? We don't need another head destroyed..
Are there any stock Lario parts the owner is going to throw away? 

[Tom]

I got the impression from post that he wanted switch out the exhaust system from the heads down.  New/different from the heads down to the mufflers. 

[Chuck in Indiana]

I got the impression from post that he wanted switch out the exhaust system from the heads down.  New/different from the heads down to the mufflers.

Yeah, that's why I mentioned just fabricating a new exhaust.. Why cut up a perfectly good set of headers?