Headers vs Manifolds

[Moparx]

So these fit my 68 imperial?

those manifolds are from the "Max Wedge" 62-63 B-body engine. they may, or may not fit your imperial due to items on the firewall such as HVAC units, or engine placement causing the right side manifold to hit the firewall and the left manifold hitting the brake booster [depending on what it's diameter is].
i owned a 69 imperial as well as a 78 imperial, however, that was so many years ago my feeble old brain does not remember how much clearance there was around either 440 to the firewall and other under hood items.

 

[68torino460]

Just spoke to TTI. They are telling me that the C body one and 7/8 inch headers will work, as well as their 2 1/2 inch exhaust. I’m skeptical, but they’re telling me that it’s the same chassis. Can you guys confirm?