Does the 73 240z stock exhaust bolt onto a 78 280z exhaust manifold?

I have a complete 240z factory exhaust and want to replace the existing exhaust on my 280z.

I am wondering if the 240z manifold is has the same configuration for the bolting of the exhaust piping as a 280z.

I know this will eliminate the cat but here in texas smog exempt is '84 and under.

Anyone?

Yes or No or maybe will do.

My thought is that the collector pipe would bolt up, but I don't know for sure. I've only ever dealt with 240's.