Originally Posted by Homemade WRX
yeah, I'd thought of doing similar and just using .25" thick angle with nuts welded to spread.
Just a bolt hole specific spreader
I have been pondering a tool for splitting the cases for a little while now myself. With or without shuffle pins, it would be nice to not have to pry or tap on the case halves themselves to get them separated. Drew it up in Illustrator really quick.
Maybe a bit more complicated than it needs to be, but could be made out of aluminum plate. This particular design would use the crank as a fulcrum, and would basically pull the upper case half off of the pins using head stud bolts/holes.
Probably only need about 1/2" of clearance between the upper plate and the deck surface, maybe 3/4" max to get them separated.
The only catch that I can see with a design like this would be you might want to make an aluminum slug, that would act as a giant washer and would go between the rear of the crankshaft and the tool to take up the space between the crank and the tool which is determined by the depth of the bell housing on the rear of the engine case.