yeah, those are all considered as well, but with most MFG's, they keep a certain standardization to their engines. The 2.3 and 1.9 share a transmission pattern and a few other things, and can be interchanged with the 3.0 FWD or RWD platform without changing the transmission.
3.0's will fit in Escorts. I've done it. :P
I'll probably just walk into the yard and find a couple cars with D-grade engines, then swap the gears on them and see how it lines up/etc. If I can keep proper timing with the new gear, after 4 full turns, then the gear works. If the sizing looks good, it usually is. As much as people would like engine parts to be an exact science, often times, good enough really is *good enough*.
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