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350 TBI To carb

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Old August 25th, 2009, 9:57 AM
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Default 350 TBI To carb

Just got my 350 TBI motor back that i built when i was 16. I'm gonna slap a carb on her. Do i need to change the distributor? if so could i take a distributor from an older carberated 350? I can rebuild anything, just don't know about swapping out parts between different types of engines.
Old August 25th, 2009, 1:38 PM
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Originally Posted by nauticstar87
Just got my 350 TBI motor back that i built when i was 16. I'm gonna slap a carb on her. Do i need to change the distributor? if so could i take a distributor from an older carberated 350? I can rebuild anything, just don't know about swapping out parts between different types of engines.
hey bro,im curious is to why your coverting a computer controlled unit and going to a carb...
Old August 26th, 2009, 6:16 AM
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theres a story to this. My first truck was an 89' silverado. motor had 290,000 original miles when my stepdad gave it to me for my 16th. rings were shot so i tore it down bored it .60 over, .30 originally but it needed more, gouges in the cylinders. put a cam and heads on it. blew the tranny in 2weeks. got a benchjob 700r4, tv cable wasnt rite blew the clutch paks. 13 tranny rebuilds later warranty was voided. put a used th400 in burned it after 15,000miles. put a jegs th400 in. i was working in lousiana brother installed it for me built me a driveshaft which i didnt want him to. got home drove the truck 30miles blew the driveshaft sold the truck that nite for 550 to buy a 600 ford. anywho my friend bought my 89' he swore he'd have that motor in something in a year. its been almost 5yrs. i finally got it back. and plan on putting it into a 74 chevy pick up or a 85 k5 blazer. thats why i wanna go carb, cause the engine prolly aint goin back into a computer controlled truck. sorry for the story.
Old August 26th, 2009, 11:26 AM
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Originally Posted by nauticstar87
theres a story to this. My first truck was an 89' silverado. motor had 290,000 original miles when my stepdad gave it to me for my 16th. rings were shot so i tore it down bored it .60 over, .30 originally but it needed more, gouges in the cylinders. put a cam and heads on it. blew the tranny in 2weeks. got a benchjob 700r4, tv cable wasnt rite blew the clutch paks. 13 tranny rebuilds later warranty was voided. put a used th400 in burned it after 15,000miles. put a jegs th400 in. i was working in lousiana brother installed it for me built me a driveshaft which i didnt want him to. got home drove the truck 30miles blew the driveshaft sold the truck that nite for 550 to buy a 600 ford. anywho my friend bought my 89' he swore he'd have that motor in something in a year. its been almost 5yrs. i finally got it back. and plan on putting it into a 74 chevy pick up or a 85 k5 blazer. thats why i wanna go carb, cause the engine prolly aint goin back into a computer controlled truck. sorry for the story.
ahhh i see(i guess)that will be a cool build ...i would go with the 74..imo....but iv'e got it for the blazers..keep us posted on your progress,
Old August 26th, 2009, 7:07 PM
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I think you will need to change the distributor to a vacum advance type without the computer to advance the timing.
Old August 27th, 2009, 10:31 AM
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Somehow, I'd be more concerned with the intake manifold. Will it just mount up any old carb you happen to want to slap on from TBI all of a sudden?

Spark distribution would be at the bottom of my list. Adjust the timing to get the final adjustment on the mixture right, and use the distributor(or better yet, go MSD) that came with the engine.
Old August 27th, 2009, 8:09 PM
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Yes, you would need to change the intake. I took that for granted in the carb swap, but I don't understand how he could use the same distributor without a MSD controller or changing to a vacuum advance.
Old August 27th, 2009, 10:49 PM
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You would need a vacuum advance distibutor.
Old August 28th, 2009, 11:10 AM
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Sorry, my MIND READER took the week off...
Old August 29th, 2009, 8:56 AM
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intake manifold is taken care of, apparently theres a 77 intake manifold from a 77 vette on it now. if not i'll retrofit one. Thanks for the help. I'm pretty sure I'm just gonna run a MSD setup.


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