It also depends on what flywheel/flexplate you plan to use. The 153 tooth 12 inch flywheel uses the straight bolt pattern starter. The 14 inch 168 flywheel uses the staggard mount starter. You`ll need to check your block to see if it has provisions for both starters.
I don`t know what purpose you plan to use this engine for so I will say if you plan for any street duty you are way over cammed. A cam that size will need at least a 4000 stall, again way too much for the street. To run a cam that size in a small cubic inch short stroke 283 you must be planning on revving it way up there.