Price Motorsports old school high port exhaust port mod ala Cleveland high port

I did a search through the way-back machine and found a few references to them and a lot of confusion of them compared to say the old MPG "plates" which are not similar at all. For those not familiar, you basically mill OFF the top of the exhaust port and then bolt on this aluminum replacement port to straighten out the flow. Am I going to do this? Maybe but really curious to see if anyone has actually done it and what the outcomes were. Then there is the fact they raise your exhaust ports up a notable amount which could create new issues with header fitment depending on application. High Port Exhaust
Now I know with aluminum heads being really the better investment of my money that these may be a waste of time to investigate but I think it is at least worth seeing if anyone actually has run them and the results. Roush and others did this sort of mod to the old 4V cleveland heads way back in the 70s for Pro Stock racing with good results on the Cleveland head which has similar faults to the 429/460 head. Not exactly the same limitations but the whole turn to clear the towers issues forcing the port to make that U turn etc..