If you got fuel and spark it should crank , guess you made sure the spark is on the compression stroke , not 180 off , seen that quite a few times , I ask that because you may have pulled the distributor out and use the pinto one , and last did you hear the engine run before you installed it ? The timing gear may have failed , but 90% of the time when they do the cam will not turn at all , or if the engine was overhauled they may have mistimed the gear , and last a clogged exhaust would stop it from running , I would look at the timing , or weak spark when cranking ,