I am really getting confused on head choices for this big of a motor. Seems like most people recommend going to a big chief style head at that cubic inch. Then there is the reliability issue of the valve train question. What do you think of this post I found?
I would strongly recommend that if you are going to the trouble building a 632 to run decent heads (ie BIG CHIEF or RFE or something serious). There are diminishing returns after 540 to go with a conventional head. The difference in power can be 100 or more. I ran the BB4's on the dyno before I went big duke and it WAS 100 more horsepower and didn't give up any power down low.
About the funky valve angles - buy the offset lifters - the pushrods are moved slightly off center to improve the geometry. I had zero problems with that on the street. The weak link will always be the roller lifters anyways, the valvetrain is a TANK if you go big chief/jesel.
Here is the link
http://www.chevelles.com/forums/printthread.php?t=93327
I hope I am not opening up a can of worms here, I am just trying to learn.
I want to make the right choice and am looking for more opinions. I think the very least I should do is the 18* Oval Dart 383 head...
Thanks all...