48 degree r3 block
I don't know what the sprint car blocks are called (R3, R5, R8 etc) but my
friend Greg Charney told me he just found a couple more including a tall
deck version that he is going to build up over the winter that will be able
to achieve 440 cu in.
![](http://i3.photobucket.com/albums/y93/OLDMOPAR/Greg%20Charney/GCNO1_zps35073798.jpg)