So I've decided to abandon the GSL-SE 13B engine and swap to this...
I found this 12A engine in a pull yard a few month's ago in an earlier-model FB that was apparently junked because its differential exploded. This 12A has obviously been rebuilt, and the irons are painted the same Mazda blue that my other 12A was in my RX3. A sign from the rotary gods??? ...Of course it is!
As far as I can tell this 12A isn't ported, so I am going to pull it apart to be sure it's worth using and bridgeport it. I'll be using a Weber with this manifold... (Thanks Whizbang!)
And once this 12A is ready it's going to be mounted to this FC subframe custom-fitted to my FB. Along with FC rack-and-pinion steering, front suspension/struts, and 4-piston brakes.