302 head question
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Mountain Pass
Joined: May 2007
Posts: 223
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302 head question
Building a 302 for my 85 2wd. I bought the block and stuff and it came with some D00E B 302 heads from the early 70s I believe. The heads are dissasembled. Only have half the valves, the valve springs are bad. Rockerarm studs only have 8 of them. I should have checked all the boxes before I bought it. The lady and man selling it told me I pretty much had all I needed to build the motor. After I got it all home and went through it all it was missing a few things. Someone did what looks like a crap port job on the exhaust side, kinda thinking they didnt grind it down to match a gasket.
Anyways, I have to buy valves, springs, some other hardware, have a machine shop check guides/seats.
Should I just look for some used GT40s fully assembled? Since it looks like after buying parts alone for these old heads it will end up being close to 200. Like 10 dollars a valve, springs are a little less maybe plus the machine work.
Not sure if the heads I have are worth fixing up, high flow? high compression?
Anyways, I have to buy valves, springs, some other hardware, have a machine shop check guides/seats.
Should I just look for some used GT40s fully assembled? Since it looks like after buying parts alone for these old heads it will end up being close to 200. Like 10 dollars a valve, springs are a little less maybe plus the machine work.
Not sure if the heads I have are worth fixing up, high flow? high compression?
Last edited by Butl85; May 25, 2007 at 04:50 PM.
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Joined: Sep 2005
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From: Kiefer, Northeastern Okla
The DOOE B's are not bad heads. 1970, 58.2cc chambers, prob'ly don't have hardened seats unless they've been worked. That's really a shame someone butched 'em. Small valves, 1.78/1.45, so flow's not that great, but they'd be OK. Premium gas w/ flat top pistons, maybe, depending on cam and tune. You'd more than likely have more in 'em than they're worth by the time you're done. The GT 40's a good head, but for the money, check these out:http://www.thumperoforangepark.com/.
I used them on a motor for a freind about a year ago, and he's pretty happy.
Pete
I used them on a motor for a freind about a year ago, and he's pretty happy.
Pete
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Mountain Pass
Joined: May 2007
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Those look nice but I'm looking to spend as little as I can to get it running good. I'd like some high numbers but I'm on a tight budget so I'm hoping I can find some heads somewhere that someone just needs to clear out the garage but are in good shape and assembled.
I'm already going to have to come up with a cam and intake so I figure those two things alone will give me the power I'm looking for even with some stock heads. I'm hoping for 250hp at the crank and I'll be happy. Seems feasable with decent cam, intake, carb, and a nice exhaust from headers back.
I dont need a bullet anymore, already have a 2003 lightning I'm trying to sell.
I'm already going to have to come up with a cam and intake so I figure those two things alone will give me the power I'm looking for even with some stock heads. I'm hoping for 250hp at the crank and I'll be happy. Seems feasable with decent cam, intake, carb, and a nice exhaust from headers back.
I dont need a bullet anymore, already have a 2003 lightning I'm trying to sell.
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