don't go putting a 149 head on a 202. Just don't. Especially with the blue motors. They are superior to the red motor in every way with the exception of red XU1 motors.
There's 3 versions of blue motor
2.85 high compression - 9.0 to 1
3.3 high compression - 8.8 to 1
3.3 low compression - 7.6 to 1 of which there are bugger all
I can't remember exactly, but I think the 2.85 head has a smaller combustion chamber, valves etc are the same so putting a ported 2.85 head on a 3.3 works out.
you could just about get away with 149 heads on an old 186 because it still had a 3 inch stroke crank. The 3.3 has a 3.25 inch stroke and it starts to get way too hard.
Or if rebuilding you can get flat top pistons which are a better way about it, and a lightened flywheel, hotter cam, + less restrictive exhaust pipe from the manifold back. clean up the ports in the head, makes a massive difference.
I have a factory manual on the blue 6 and V8 motors, feel free if yoyu want specs.