small block heads, 4027596 casting # any good??

74scamp360 said
lol thanks guys for all the advice. The big thing with this is it would be easy for me to get the 596's because they'll be in a trade for my /6 stuff. Like i said before i definatly don't have the money to go out and buy a nice set of aftermarkets, and thanks for not suggestiing it, i've noticed that some people don't care what you say, they just keep insisting that you should be buying aftermarket ones. If i do end up getting these heads what do you guys reccomend on mods for these heads (trying to keep in mind the budget). I'm just thinking maybe leave valve sizes alone and focus more on porting and polishing etc etc? I'm asking you guys because i know you've all gone through this before and i still have much to learn. My dad is a great help but he's a big block guy, he didn't even know about externally balanced motors lol. Thanks again guys, much appretiated

Well, I would get a nice set of ferrea valves, bronze guide liners, hardened seats on the exhaust and some viton positive seals to go with the cutting down and machining the guides to .500, do some porting , then cc and mill/correct if necessary to the desired chamber volume.

Intake port-Finding the peak [tallest part/beginning of the short turn] and just roll it around towards the seat but don't touch the VJ angles.
The push rod pinch should to be ground out straight and the rest of the wall blended into the bowl. the roof and guide boss kink can be ground higher and more smoothly turn down into the bowl. The guides can be skinny'd up quite a bit, keep the guide long with an edge at the beginning then rolled/roundish the last 3rd towards the V stem.

The exhaust guide can be ground out completely and the kink can be straightened out a bit too, feel through the freeze plug hole on each end port to gauge with your fingers, you can take around .080 out. Then short turn just wants to roll a hair off the seat then straight up and slightly rolled at the top. Polish the crap out of the exhaust port.

Just some advice.
have fun