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iv got a vortec 350 that came out of a 99 van and it didnt come with a flex plate can i use a 89 4.3 flex plate and use a 85 4.3 starter on it the vehicle that its goin in is a 85 4.3 and i know the flex plate off of the 85 is diff than the 350 one and wont work but the stock numbers are the same for the 89 flex plate and the stock 350 flex plate sence the starter and the flex plate came off a 4.3 is it possable to use them on the vortec 350?
 

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i saw what you did there!
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as long as the flexplate is the same diameter as the 4.3 ones are then it should work

as long as the plate is not externally balanced one

no balance weight on it

the crank flange bolt pattern is same 86 up,. new RMS design starting in 86


is the 4.3L one you have a 12.5" or a 14" ?
 
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