Well I apologise if I am wrong,it just seems you are more skeptical of trick flows then the heads you have. It's good you are not scared of Chinese parts,we all got a lot of Chinese made stuff and I wouldn't hesitate to buy the heads you did for what you paid if I was building a milder engine or was on a seriously tight budget.If edelbrock would price the rpms realistically or add a couple features to them they would be a great replacement head as well. Once you step up in flow/spring requirements etc. that's when the trickflow is hard to beat for the money.