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2000 trans am backhalf build(pics)

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Old Feb 12, 2009 | 06:05 AM
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Default 2000 trans am backhalf build(pics)

im building my 2000 trans am with a full back half 9 inch rear 18* 400 sbc 12 point funny car cage. heres my progress so far.






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Old Feb 12, 2009 | 06:26 AM
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yes it came out through the top











the pistons shown are for sale those were for a 23* head since im doin a 18* set up those will not work so there for sale pm me about them if interested. ill get more pictures this weekend when i start welding in backhalf and cage.
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Old Feb 12, 2009 | 07:03 AM
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How do you plan on hooking up your driveshaft to the dragster coupler?
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Old Feb 12, 2009 | 08:28 AM
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Not bad. I see you don't have much room to work with, like most of us @ here Had alot of throw on that crank...how much? What heads you running? Carb? FI? Tranny? Tire?
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Old Feb 12, 2009 | 08:40 AM
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Looks like a 350 block. What's your combo?
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Old Feb 12, 2009 | 09:01 AM
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how much for the LS1? hehe
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Old Feb 12, 2009 | 09:53 AM
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I like the Ferrari style engine assembly room. The plants keep the humidity levels in check.
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Old Feb 12, 2009 | 02:03 PM
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the dragster couplers coming off that was on there when i got the center section. im boring the 350 block from 4.030-4.155 with a 3.750 stroke,6 inch rod and its gonna b 18* gm heads fully ported,ported/port matched intake. all that through a powerglide. yea if you can see there is a shop where i can do a lot of work but right now its kinda full so i couldnt get my car in but were getting a bigger one soon. so i didnt wanna wait i needed my car done. yea i thought the plants give the garage a nice aroma lol my mom puts all her crap in there.
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Old Feb 12, 2009 | 02:13 PM
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i don't think you can take a 350 block over that far
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Old Feb 12, 2009 | 02:17 PM
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im sorry its gonna b bored to 4.125. and thats only .090 tir so on each side thats only .045 thats nothing. and with filling the water jackets and having valley girdles ill be more than good enough.
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Old Feb 12, 2009 | 02:28 PM
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Haha i was just gunna say... those plants need a little water...

But good god damn luck with that build... your a brave person to take on that challenge.
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Old Feb 12, 2009 | 03:06 PM
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i shed a couple tears when i started cutting into it.
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Old Feb 12, 2009 | 03:59 PM
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you will shed more along the way too. lots of work ahead and its all the small stuff that takes forever.
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Old Feb 12, 2009 | 07:34 PM
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The old style 350's come factory with a 4.00" bore. so your bore will be .125" over from stock bore. The motor must have been bored .030" once before,and that .0625" on each side, paper thin, I would have it sonic tested for that big of bore. A 400 has a 4.125" bore from the factory.
Im very interested in the tubing of your rear, I thinking of doing it my self, keep us posted and pics in progress
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Old Feb 12, 2009 | 09:32 PM
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yea im not worried about the walls being too thin. my motor options are still kinda in the air. i could do my18*sbc or get a 454 big block for a good price.
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Old Feb 13, 2009 | 08:12 AM
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Originally Posted by Randy WS6
The old style 350's come factory with a 4.00" bore. so your bore will be .125" over from stock bore. The motor must have been bored .030" once before,and that .0625" on each side, paper thin, I would have it sonic tested for that big of bore. A 400 has a 4.125" bore from the factory.
Im very interested in the tubing of your rear, I thinking of doing it my self, keep us posted and pics in progress

Yeah, I agree. All of your 350's, regardless of year (Gen I)come with a 4.00 bore, and there is no way you are gonna hit 4.125 on a stock block without hitting water. A 400 block, yes. A 350? No. Even on some BBC you would be hard pressed to take a stock block .125 over. Ain't gonna happen on a 350, sorry. .060 sure. .090 maybe, if sonic'd. More than that and you are hitting water.
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Old Feb 13, 2009 | 03:03 PM
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i dont think you guys realize how little that really is it sounds like a lot but laid out its not, and remember i got an aftermarket bowtie block so i got a lil more to work with and with filling the water jackets it will be fine
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Old Feb 13, 2009 | 04:11 PM
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I'm sorry but the block in the pics is a GM. Not a bowtie. Take the advice- it won't go .125 without issues.. Just get a stock 400 block and save yourself the headache.
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Old Feb 13, 2009 | 05:04 PM
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Originally Posted by pwtr02ss
I'm sorry but the block in the pics is a GM. Not a bowtie. Take the advice- it won't go .125 without issues.. Just get a stock 400 block and save yourself the headache.

Im with you,^^^ , If could see the casting numbers on the back of the block, drivers side , below the heads were the tranny bolts, I could tell you what the block came out of. And if he uses the crank that in the pic. he will haft to get custom main bearings , The 400 cids. come will larger main bearings.
If you get a 400 block make shore you check the steam holes that between the cylinders , most that Ive seen is cracked to the head bolt hole. The casting numbers on the 400 block , The last three digits ,for a four bolt mains is #511, the #817 is a two bolt but very strong block extra casting, the #509 is just a standard two bolt block witch is the weakest of the three. unless you in stall splayed main caps.
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Old Feb 13, 2009 | 05:23 PM
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509 is actually the strongest and most desirable of the 3. The 4 bolts don't have enough meat in the webbing to hold the extra bolt.
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