Updating 311 exhaust - bravo

[Formula311-SR1]

Ok it's time to start shopping for exhaust for my 311 with some new to me 502s. Wondering what measurements I need to get before I start looking. I think the three inch spacers in the stock exhaust manifolds mean it's not a standard bravo exit location, correct? So when shopping what do I need to look for?
Looking at new or used Gils, dana, stainless, and lightning primarily. They seem to fit in the budget so far.

Thanks

 

[Ted]

Stainless is the only way to go, mine are pristine after about 8 years. Same exact set up. I can send you any measurements you need. My tails are about 6 inches high and go back about 4-5 inches past the valve covers at the rear,

 

[Formula311-SR1]

That sounds good, I'll IM for for dimensions.
What version do you have? Seems that have v1, v2 and stepped, straight tail pipes?