The only difference is the radius of the rear? radius seal? I have collected over the years a few rather nice road race pans, that were sold to me as 360 pans and I discovered recently they are 340's. They are $300+ pans and I can't find any listed new stock pans for road race any longer at Moroso, Milodon, or Canton. So anybody ever jigged up a 340 and welded in a 360 Radius? How did it go?

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.