I have a 1989 Iroc Z 350 tpi what bolt main is mine? I am having a hard time finding it. I am planning on using stock block and modding the bajesus out of it..bore and stroke-383...cam..heads..etc. If it is a 2 bolt is there anything I can do to REINFORCE it to withstand large amounts of HP and a procharger?

 

It's a 2 bolt block
You can buy splayed 4 bolt caps and have a machine shop install them for you. Much stronger then a standard 4 bolt

 

So your saying my 2 bolt can be converted to a 4 bolt?