NO!
While .020 is enough on the exhaust, and is the factory specified clearance, for the factory engine ;
I feel that .010 is NOT enough on the intake. It will run on that probably just fine, But I have always had a "better fine" at .013. Don't even think to set the intakes at any less than .010.
I set mine on a warmed up engine. That is to say long enough to open the thermostat. Then plus whatever time it takes to get the plugs out and the cover off. I'm not in a hurry.
I take the plugs out to make it easier to turn the engine over with the fanblades. To find TDC compression, I screw in the hose of my compression tester after removing the schroeder. Then I stick the other end in my mouth. Then I turn the engine until the rising pressure blows my lips off, and continue until the falling piston sucks my tongue in. Then I back up a little. Hyup, that is exactly how I do it on the stocker. The lash setting window on the stock cam base circle, is huge and a couple of degrees in either direction of TDC has never been an issue for me.
A little extra lash is better than not enough; especially on the exhaust. I run this slanty pretty lean while cruising, to get some fuel economy out of her; I could care less about power at the top. Running lean usually burns up valves. So I give mine .023 (a '77 engine) on the exhaust. It seems to be working cuz the odo was just starting on the 5th time around; since I got her in 1994. I finally sold her last summer. The only things I did to her was 9.5Scr, a SuperSix intake, and a heck of an ignition tune.
Edit; but I think this odo reset at 80,000 kms , so that's like 200,000 miles that I put on that 225, after I rebuilt her in 1994..
