Originally Posted by BrianC72gt

Are those cam marks TDC on 1 or TDC on 5? I know the crank lock for timing service is supposed to go in at TDC 5. Cylinder 5 is the front right one when facing the engine (on the coolant reservoir side). Regarding the cams moving while trying to set time, If you have the crank lock in, and are standing in front of the car facing the engine, then apply slight counterclockwise pressure to the left cam to remove any timing belt slack. That is your timing. The engine rotates clockwise when viewed from the front, all of the belt slack should be between the left cam and the crank cog. That is the span where the tensioner is located.

The fact that the cogs are not indexed is a good thing, it allows you to degree the cams very precisely. I know someone here uses this feature to dial their fuel trim down to zero. Very clever. Back in the day, I'd drill slotted holes in cam chain sprockets on japanese in-line four motorcycle engines to degree my cams. The tapered camshaft snout on the 4.2 engine allows you to do the exact same thing. Lock the cams in place, pop the cogs, snug them counterclockwise, and your timing will be dead-nuts spot on.

Originally Posted by silverd2

I could be wrong, but I thought that 32V engines timed at #1 TDC(?) ... unlike the 40V that does time at #5 TDC.

I believe the OP is working on a 3.7L 32V (?)