68-70 340 exhaust manifolds install question

Hello all, I'm getting ready to drop in my rebuilt 340 into my 72 Scamp. Has anyone installed the engine assy. with the factory Hi-Po exhaust manifolds bolted on to the engine before dropping it in?
The car has manual steering so I hoping I can clear the steering shaft and the engine drops into the K frame. Anyone done it this way?? or,..... should I install the exhaust manifolds after the engine is on the K Frame??
Thanks for your feedback.
HR20
Author: HotRod20