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Old 08-23-2003, 11:27 AM
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Machine Shop Vocab

ok i have a 350 block that i got from a junkyard for free. It was off a, I was told 83 f-body. I'm not sure and i don't trust the junkyard guy but it was free. Ok well i want to have it bore out to a 383 but i don't exactly know what to say i mean. I'm not literate in machine shop. Exactly what should i ask for, i mean i want to make sure this block is good or just junk metal? and what else should i have done to the block to have it put out good power also what exactly does it mean to have a car stroked??

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Old 08-23-2003, 11:51 AM
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Its not just a matter of boring the block out.
A 383 is a combination of a 350 block along with a crankshaft from a 400 that has main journals ground down .200 to fit in your block, also you need the 400 rods, and a special piston so you dont get too high on compression ratio.
Lot of work & money for those extra cubes, I would build a 350 with flat top pistons and spend that extra money on the cylinder heads.
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Old 08-23-2003, 11:51 AM
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first thing, make sure what you have is a 350, since a camaro and firebird were not avalible with a 350 in 83. what`s the blocks casting numbers? also, if it is a 350, have it magnafluxed to check for cracks, next up, have the bore checked to see if it needs overbored, if it does, only have it bored to the smallest size that will clean up the bore. a 383 chevy has .030 overbore making it a 4.030, and a crank from a 400 small block with a stroke of 3.750, some 383 combo`s use the stock compression height pistons, and stock rods from a 400, others use the 350`s 5.7 rods and a shorter compression height piston. anyways you decide to use either, some grinding for clearance will have to be done. to "stroke" a engine is to add more stroke. also keep in mind if you use a 400`s crank, the mains will have to be turned down to the 350`s size from 2.650 to 2.450. most aftermarket kits have them already the size you need. also remember you`ll need the 400`s harmonic balencer and flexplate/flywheel, since the 400 is externally balanced, if you use a 350 balancer, it`ll destroy the thrust surface on the bearings. good luck.
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Old 08-23-2003, 11:54 AM
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If it was free, you'd better check & make sure it's not a 305 (or worse). It wouldn't be the first time.
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Old 08-23-2003, 11:59 AM
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where is the cast number?? and how would i figure out if its a 350, from the cast number?? will it say 350 on it?? also how much will it cost to have all this stuff done. The block wasnt free exactly, me and my friend bought a bunch of parts there and he wouldn't lower the price to what we wanted and we where about to walk and he said he will throw in a 350 block we thought it was a good deal so we took it.
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Old 08-23-2003, 01:27 PM
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Casting number is above the bellhousing flange behind where the left cylinder head goes. It may also say 5.0L or 5.7L near there (5.7L=350). You could get a ruler & measure the bore. 4"=350, 3-3/4"=305.
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Old 08-23-2003, 05:07 PM
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its not there..??? it is a 350
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Old 08-23-2003, 07:24 PM
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wuts the casting #'s?
can get a rough idea from those..
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Old 08-23-2003, 08:06 PM
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i dont know i cant find it, i looked where jim told me and it isnt there i also looked on the right cylinder head it isnt there and i measured the bore it was about 4". Is it normal to have a slight diffrence in each bore??
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