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The pic is my carb. I have no choke or anything like that. I simple put in a proform main body and that's it. Only thing that needed messed with was acouple holes for the rolled pins were alittle too shallow and some holes on the base plate were in a different location but demon gaskets have...

Agreed. They wanted me to send in the old one before they "could" sell me a new one.

They do interchange.

The rocker tracks really good threw the sweep. I had to keep milling the heads to get it just right. Thanks for the link.

I must have got some bad info then. I was always under the impression that the weight of the valve, locks and retainer was pretty much the limiting factor of RPM ceiling granted that had the right spring pressure. But you can only put so much pressure on a solid flat. I run jesel rockers by the way.

OK I know there is no clear cut answer on this but I would like some opinions. Lighter valvetrain equals higher max RPM without valve float so.....how much does it really matter? An example: A small block with some normal replacement stainless valves, locks and steel retainers against 5/16 stem...