Stock 340 Manifolds or TTI Shorties?

Wanted to provide an epilog to this post. Will be selling the TTI shorties at some point, but bought the Dougs D453 long tube headers and installed them. The instructions provided are pretty vague. On my '70 Duster, I did remove the engine to trans braces & mini starter on the driver side. After raising the engine, had to unbolt and lower the steering column, then removed the manual gearbox (pulled the pittman from the gearbox first). The header went right in from there. Did not need to drop the drag link as the instructions said. Excellent ground clearance and plug access is better than stock manifolds. On the passenger side, had to remove the 90* oil filter adapter and torsion bar. Header installed from underneath pretty easily. Installed the straight oil filter plate instead of the 90* (easier to get to from the top now). Had the usual challenge of rerouting my B&M shifter cable to clear the header tubes. Not a big deal, but took time. Only negative I have found is I have the PST 1.03 torsion bars and the headers are right up against the bars. Will see if I need to "clearance" them after driving for awhile. Will use my sawzall to cut the exhaust pipe back then tie the pipe to the torsion bar so I can drive it to the exhaust shop and have them attach to the new reducers. Total installation took about 11 hours with me doing all the work myself.

Edit: I am glad I have the QA1 K-member as it provided a lot more working room for this installation, especially when reinstalling the starter. Dougs said the starter had to be installed concurrently with the header, but that was not so for me.