I got lucky this time.
I changed sprockets to a 19 tooth counter....no big deal....BUT my new motor did not have the speed sensor magnets on the end of the countershaft.....if I had not changed the sprocket I would not known. Thankfully our backup-turbo motor had them.
Push wheel
I made it long because I dont know how it will need to be until I get the push bumper made. Its removable with a 1/2" push pin. Still need to finish boxing in the sides.
Water tank....a converted 5 gallon air tank (35$).
I am plumbing the system almost entirely of 1.25 copper. I had ordered (2X) .75 and it was mis-shipped and to my surprise they said keep it if it will work (the 1.25 is only 101$ per 10' section!!!) I figure the larger pipe will hold about 1 gallon additional coolant and larger surface area will help dissipate heat better between runs.
BTW:
I will be running a second electric water pump near the motor.
Starting to plumb the water system.
I also put in the "rear steer eliminators" to get rid of the Gen 2 Rx7 rear steering. This alone took the better part of a day and completely sucked…what a horrible job!