ok, i think im gonna port my heads im putting on my new motor. they're 76cc's 1.94 valves. heres the questions i got:
1. when gasket matching the intake ports, how much can i actually grind out of the hole? i mean, i know if i go too far ill be into the pushrod hole, but how much do i need to leave so it wont crack or anything? i got a old head out of the woods to practice on, i just dont know how far i can go without worrying about cracking.
2. im trying to avoid taking much metal out of the combustion chamber, the damn things are huge already, so i dont want to lower my compression any more, so whats the easiest way to polish them wihtout taking out much metal?
3. what other areas should i focus on? im new to this, and i REALLY dont wanna **** up
my heads.

i got a dremel and a few grinding bits for it, what else do i need?

thanks in advance

 

I just got a link to this site on here the other day, and it's the most complete and informative article I've ever read on porting chevy heads. It covers everything you need to do, and all the tools you'll need to do it. The article is from Standard Abrasives. You'll want to order their deluxe porting kit as it has all the proper tools you need for the whole job. the link to the article is http://www.sa-motorsports.com/diyport.htm. I bought their porting kit through Perfomance Automotive Wholesale for $39.95. You can find PAW online at www.pawengineparts.com. Even if you decide not to buy their porting kit, definitely check out the article. It's worth its weight in gold.

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89RS w/350 TPI; 69RS/SS w/450 HP 350/Muncie 4-Speed "Too weird to live, too rare to die."