It's been years since I've posted here, so long I've had to create a new account.
Question for you all, is there anyone one in Sydney metro who can clean cylinder heads and blocks? Years ago I had a few down where they cleaned out the internals along with a nice bare metal clean outside finish. I have a few 12G295 and 12G202 heads that I found my garage I'd like to get cleaned. How much does it cost these days?
Everyone I used to know has either retired or died.
Thanks

http://www.redistrip.com.au/
Good but not cheap.

You could also put them in a bath of molasses + water 1:3 mix. Need to degrease first. Takes about 3 weeks to eat the rust.
I've used it for blocks and heads.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.