Exhaust:
The entry on the headers needs to be ground slightly bigger than the exhaust port exits in the cylinder heads. The cylinder heads have had so much critical attention that if this important transition area is crappy, we might as well have put crappy heads on your engine. If your headers were run on our dyno, we’ve already ported them for you.

Driveline:
Bell Housing – Proper bell housing to crankshaft centerline alignment is critical. Place a magnetic dial indicator on back flange of crankshaft. With bell housing installed over dowel pins, rotate engine while watching the sweep of the indicator around transmission mount hole. There are offset dowel pins to correct the alignment. After installing offset dowels in block, that block must be dedicated to that bell housing. Other blocks can be dialed in to that same bell housing, but if a different bell housing is used on block then procedure must be repeated. This misalignment could be from bell housing dowel holes, and or transmission mount hole location and from the block dowel locations where the actual correction was achieved.

Torque Converter – Standard type converters need at least 1/8 inch at very minimum clearance between a straight (if it is bent or crooked it is junk) flex plate and converter. Stall converters need a bit more space as they grow in length due to the extra heat generated.
Procedure – Install converter bolts slightly finger tight. Spin converter around and verify everything remains finger tight. Now spin it again and snug the bolts a bit. At this point, you’re not trying to lock it down rather sneaking up on tight, a little at a time. Spin it again and go a little tighter on each bolt. You may spin engine many times doing this procedure but it is best way to get converter centered up.

Note: When completed, regardless of a converter or a clutch, the end play on engine needs to be checked with a dial indicator. There should be about .005 That verifies nothing in driveline is binding up engine. Less is too little and a lot more indicates a problem that needs to be addressed