Doug Thorley Headers with SB Trick Flow Heads

The engine should not be centered. If forget the exact amount but IIRC its .750 or so.

I was told it was done to make the starter fit, but I can't verify that.

If you measure the chassis you'll see the T bars are centered in the chassis but the engine isn't.
I understand that, the t/bar mounting points are a giving, you can't shift the motor from side to side in the K member enough to make a difference as fare as header clearence. Both sides on my car were jamed tight, I am sure the Kmember in not bent.So I can only come to the conclusion and that is what I said above.