Originally Posted by Rodrigues

No I have not had problems welding on A356 OldSStroker and a poor welder can leave contamination and pits due to a poor weld which gives reason for their warning. The A-356 is a popular casting material for wheels and engine components so it is not a problem to find a heat treater especially in my area as I can name quite a few across the top of my head on top of my head besides the one I work for. They can be done with a few processes (F, T-51, T-6, T-7) but these heads would be done with a T6 process which means they are dipped in solution approx 1000*F for approx 5 hours I would be more than happy to a take a pic of the weld on the 18X heads OldSStroker but I am not willing to take off my valve covers. The welding to convert the heads is done in a non critical area that would not require hardening and by no means would anneal the whole head.

Originally Posted by OldSStroker

Thanks for the solution HT info. FWIW, what would you charge for doing the necessary welding to convert a pair of 18X to reverse cooling? Just curious.

Originally Posted by Rodrigues

The price a shop would charge would be between $200 - $300 to convert the heads (IMO its simply not worth it to charge $200 or so to drill into somones $2500 heads) www.cfmmotorsports.com would be more than happy to do it for you in that price range. BTW the only real welding involved is closing the coolant passange that the new oil drain passes through.

Originally Posted by jerminator96

Well it's worth it if someone wants to run an optispark and keep their LT1 as stock appearing as possible I guess. I actually thought you could do the conversion for some reason, thanks anyway though.

Jeremy

Originally Posted by Rodrigues

I can only dream!

Originally Posted by jerminator96

I'd say you ought to learn....based on some of the responses there is definately money to be made

Originally Posted by Rodrigues

I'm working on it! Still trying to but it's hard when I can't even find the ON button on my CNC!