For one of our customers, I will be replacing his 5.0 L (SB) by a 496 HO

Can I use the existing Y-pipe for routing the exhaust through the prop / diverters or do I need another one for a BB ?

Someone knows partnumbers ?

Part # 807130A 4 will work with a 4.3, 5.0, 5.7, 7.4 and 8.2. Never tried it with the 8.1, I know the exhaust is different on the 8.1.