Hardblock?

[carl hinkson]

Originally Posted by Tony Goodman

I believe a Dart SHP block is less than $2000. There is also the money you will spend on the stock block you will not have to spend on the after market block. Filling, cleaning, checking... So that cost can be deducted off the price of an after market block also.

You can buy an SHP block all machined and shipped for that kind of money.

Things that should be addressed when having one of those blocks machined.

– Main housing bores chamfered
– Freeze plug holes and rear cam hole are chamfered
– Line honed to at least the middle of the spec or high side if needed
– Decked to your demension
– Bore to your spec
– Plate honed using the same gasket and hardware that will be used in the end build
– Lifter bores checked and honed to the lifters that will be used in the end build
– Top of lifter bores chamfered
– Bottom of the cylinders chamfered
– Tap oil galley holes deeper
– Chamfer Distributor hole for O rings.

[David Lee]

that is great advice for chevy people, how about small block mopars?

[carl hinkson]

Originally Posted by David Lee

that is great advice for chevy people, how about small block mopars?

Those blocks are hard to come by .

Check with Ray Barton

[David Lee]

Originally Posted by carl hinkson

Those blocks are hard to come by .

Check with Ray Barton

and at over 3K

[James L Miller]

Any special preparation needed before HardBlok? Is the standard hot tank good enough, or does it need special rust removal to get a good bond to the iron? I'm thinking muriatic acid inside with a water flush. Maybe follow with Evap-o-rust or is all of that overkill?

Found this online.

http://dalhems.com/f/d/808c931833604...str-022005.pdf

[Alan Roehrich]

The muriatic acid cleaning is an excellent idea. I don't use anything after that except a flood of good clean water.

I bolt a head to the opposite side of the block, and torque the main caps. Then I pour the first side, and immediately install a cylinder head and torque it. I let it set one week. Then remove the head on the other side, pour that side, reinstall the head, and let it set another week.

[Paul Precht]

I use Halco Machine Grout in the BB Chryslers and never had any out of round issues. Is the Hardblock the issue or is it because the Chevy blocks are softer and maybe thinner. I'd love to have one of the new aftermarket BB Chrysler blocks avail but at 4K that probably wont happen. I use the 413 industrial blocks for my 63 and they are about .300" before machining but filled a standard 383 block for my Challenger about 3 years ago and haven't machined it yet so I think it's cured by now. How long are the people who had trouble with the Chev's waiting before machining.