you can install the headers with the motor in. The 2 inch pipe should be OK, not ideal though.
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'69 CST Short fleetside
Lowered, 400 small block, 700R4, 4 wheel disc brakes, front & rear sway bars
See my truck at:
http://www.geocities.com/low69cst/
Student at the University of Kentucky.
Feel free to message me on AOL, SN- SS95ZQ8
My Dad's projects:
72 Short Fleet 4x4 Chyenne Super
72 Long Fleet 4x4 Chyenne Super
Both 350 autos restored original