i am building a 377 stroker(350 block 4" bore) and i am wondering if these heads are any good and if they would be a good choice to run

 

if you have the money to spend i believe the GM Fastburn III's are the best heads on the market. they have an excellent flow rate and you can get them ported for $1000 more

 

I have a Fastburn 385 which comes with Fastburn heads. I can't compare them to a different set but I did add the Hotcam kit which boosted it to 430 hp. My research indicates that the heads will support over 500 hp. What other additions are you planning to add to the 377. Is this going to be a replacement engine for the 383 you have in your signature? If so, you probably won't make more horsepower then what you have now unless you really get radical.