Thread: Okay heres what I am thinking for my 350 Upgrade.

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Hmmmm, the tech sheet you linked says 2.02"/1.60".

This KD-912 will be easy on the wallet. You can use it to disassemble the heads as well as use it to change valve springs with the heads on.
http://www.mytoolstore.com/kd/kdengi13.html

You don't necessarily need shop air to change the springs with the motor assembled. Remove the spark plug, roll the piston down in the bore a little and fill the space above the piston with clothesline rope fed through the spark plug hole. Roll the piston back up to shmush (technical term ) the rope up against the valve heads and remove the springs.

Originally Posted by techinspector1

...fill the space above the piston with clothesline rope fed through the spark plug hole. Roll the piston back up to shmush (technical term ) the rope up against the valve heads and remove the springs...

I've heard this trick before and know folks that have been successful at it but I have also heard there can be risk of cutting the rope if it manages to get caught by a valve or coiled too much below the plug hole... something to think about. The shop air approach is "safer" in my opinion.

-Chris

Originally Posted by skids72

I've heard this trick before and know folks that have been successful at it but I have also heard there can be risk of cutting the rope if it manages to get caught by a valve or coiled too much below the plug hole... something to think about. The shop air approach is "safer" in my opinion.

-Chris

I have shop air no worries. I just need a spark plug air fitting. I have heard you can make cheap homemade ones with a air fitting old spark plug and welder.

Do I really need to have the heads tested for cracks? Is this vital? Is it a major problem with cylinder heads?

Originally Posted by LURCHBIOTCH

I have shop air no worries. I just need a spark plug air fitting. I have heard you can make cheap homemade ones with a air fitting old spark plug and welder.

Do I really need to have the heads tested for cracks? Is this vital? Is it a major problem with cylinder heads?

It's your call.