I am looking to buy a new hydrolic (spl) cam/lifters set for my 1964 Chevy 230 CI w/a mild thump to it but have no idea where to start looking. I would like it to have just enough thump to know it isnt a stocker. I want to run stock lifters and springs.

Any help on the lift and duration would be greatly appreciated and what manufactor should I look to.

Thanks in advance
Larry