First off I just found out i have a 53 block. Also my truck is now taking about 20 revolutions to start. Anyone have any guesses why it would be doing this?
i have a 53 block...and knock on wood haven't had a problem yet. The starting problem definately is not because of the block though....looks like others are giving you good ideas to fix that though53 block is not always a rpoblem, seen a few pulling truck and drag trucks with them and they do fine.
Not 100% sure what all is going on with the truck. Does it run fine once it starts? Might be your fuel system back draining and it takes that long to get fuel back into the engine.