[KobaltBlau]

duh, I missed the fact that you already have webers. are they 46s?

In this case changing pistons is very worthwhile, either 9.5:1 JEs for single plug or 10.5:1 JEs or Mahle Sport for twin plug.

for twin plug, look at competition engineering's site for machine work costs, it's not all that much. Then, look at the coil pack type ignition systems, not an RSR distributor, it may be more affordable than you think. if you're handy with electronics and programming you could do a megasquirt with ford EDIS modules for the twin plug for a very fair price.

the big reason to change the pistons, though, is the valve clearance, since I'm assuming the motor has stock pistons you can't run an 'S' type cam with them.

Motor 1 will still be a really good street motor in a lighter car, with Mod S cams or similar (maybe GE/DR40?) SSIs will be on the small side, for that motor, though. However, this is definitely at least a 30-40hp upgrade if done right.

Motor 2 is a nice combination as well, different personality.