69 Barracuda - 440 CID install

Questions to the group - going to reinstall the 440 back into our 69 Cuda (2 years) and want to minimize our frustration about what happens first: (Mating up to a 727 auto, no mods to firewall or fender wells)
1. Do we place the TTI headers into the engine compartment before dropping the engine in, and;
2. Do we install the starter before / after installing the headers?

Thanks in Advance!
with only a 7 ft ceiling , I did it all the hard way ...starter at the same time as the TTI headers ...