Manton has just started a extra heavy wall 3/8 now. I forget what wall it is. Terry just mentioned it to me yesterday when we were discussing something else.
I wouldn't buy pushrods from a cam company on a bet. Been there and done that too many years. It was Comp Cams that broke me. What they called custom length and custom pushrod was a length available in ther book and it took two weeks to get them. I was over charged on my card for them too.
Soon after that I discovered Smith Brothers. I bought essentially the same thing as form Comp but I spend much much less money and got them in one day. I was hooked and since 1994 I have only bought custom pushrods from either Smith Bros or from Manton. I get what I need. I pay less money and get extremely good service.
Ed