Some may know I traded my way into a 383 stroker. I have $150 in the motor, and it is a fresh build. The history, local kids works in a marine engine shop in Nashville. He builds the motor for his 02 S-10, but the motor won't work with the electronics. The kids gives me $250 cash and the motor to put his s-10 back stock. I paid $400 for the 4.3L so that's where my $150 came from.
He didn't save any of the paper work. All I know past it being a 383 stroker, is it has a .040 over bore and a comp cam 268 of some sort. It definitely has a 400 harmonic balancer, and we pull the pan to verify the 4 bolt main. He said he dyno'd one just like it that made a whisker over 400 HP.
Well, since he couldn't drive his truck, he would start it and rev the crap out of this fresh motor. Now that I got my exhaust on, you can hear a definite lower-end knock. So I am now tearing down the fresh motor. Oh well, I have $150 in it, so I am not hurt at all.
Here comes my question! The heads that are on this engine are off some sort of marine crate 350, or so I was told. They have no markings or identification numbers on them, but they are supposed to have very large valves. Does anyone have any idea what these might be? I would like to know what I have so I can find out what direction I want to go with this motor while I have it apart.
Unless these are some sort of killer heads, I want to get a set of 2.02 double humps from a friend and go with a thump'r series cam something in the 290 range.
I had a set of vortec's that I sold. I am just not sold on a vortec head, and no matter of convincing will change that. I have seen and heard of to many cracking and bend valves lately.
He didn't save any of the paper work. All I know past it being a 383 stroker, is it has a .040 over bore and a comp cam 268 of some sort. It definitely has a 400 harmonic balancer, and we pull the pan to verify the 4 bolt main. He said he dyno'd one just like it that made a whisker over 400 HP.
Well, since he couldn't drive his truck, he would start it and rev the crap out of this fresh motor. Now that I got my exhaust on, you can hear a definite lower-end knock. So I am now tearing down the fresh motor. Oh well, I have $150 in it, so I am not hurt at all.
Here comes my question! The heads that are on this engine are off some sort of marine crate 350, or so I was told. They have no markings or identification numbers on them, but they are supposed to have very large valves. Does anyone have any idea what these might be? I would like to know what I have so I can find out what direction I want to go with this motor while I have it apart.
Unless these are some sort of killer heads, I want to get a set of 2.02 double humps from a friend and go with a thump'r series cam something in the 290 range.
I had a set of vortec's that I sold. I am just not sold on a vortec head, and no matter of convincing will change that. I have seen and heard of to many cracking and bend valves lately.