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Old 12-05-2009, 08:29 AM
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SBC Variations

What are the variations of the 350 SBC throughout the years,
I'm looking to rebuild mine out of a 70 pickup (4bolt main)
what would be different about my block then say the block out of an 86?

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Old 12-05-2009, 09:21 AM
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one piece rear main seal
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Old 12-05-2009, 09:56 AM
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anything i should know that may interfere with buying parts or rebuilding?
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Old 12-05-2009, 10:39 AM
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well i see in another post that you are building a stroked 1970 350, if this is all then you are fine and the majority of all the cranks you will see are for these pre-86 motors, if you are thinking of building a 86 and up block then you will need to find a crank made for a one piece rear main seal motor, this is not hard to do, http://www.competitionproducts.com/ this is the site i have bought all my parts from, they have a better selection than summit or jegs and tend to have some better prices, they also have more of the less common rod sizes, ring manufactures, pistons, and different crank stroks, cause you can put larger than a 3.75 crank in a 350 block, it just requires more clearanceing, with the 86 and up motors you also have to check for wether or not they are OEM roller valve train motors, for these you will need to stay with the roller set up
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Old 12-05-2009, 10:53 AM
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Alright awesome thanks a bunch guys. any idea on which heads would be good on my stroker?
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Old 12-05-2009, 10:59 AM
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what is the intent of the motor, on your other post i see you want around 400 hp, if so a decent set of 906 or 062 vortecs work very well, and with a little machine work they make for a very nice budget set of street heads
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Old 12-05-2009, 11:06 AM
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This is the reason i came to this site, im not completely sure the exact path i would like to take,
-Reliability is a big issue for me
-it will be a good looking truck, but functional
(so i can haul my quad in the box)
-but i do want to turn some ponies out. a friend of mine put minimal money into his stroker build and its about 425hp and still a good daily driver.

this would be good for me, but if i can get more, and still keep the reliability i will.
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Old 12-05-2009, 11:17 AM
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well the cam is really going to tell what kind of driver you will end up with, the rear gears will be a big factor as well.

what vehicle is this going in, will there be any racing done it it, what are the rear gears, and size of tire.

425 out of a 383 is not very hard to acomplish, mine is turning out a bit over 5oohp/and tq, but this is not what you would be looking for, if it is to be more of a day to day driver
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Old 12-05-2009, 11:45 AM
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As of right now, im trying to find an early 80's 1/2 ton to put it in,

i pulled the block from my 70 but its a 3/4 ton, not really something i want to do up
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Old 12-05-2009, 12:04 PM
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oh man i would, i love the 70's trucks and you can't go wrong with a 3/4 ton truck, i drive a 02' gmc sierra 2500hd 4x4, and i love that truck

a 383 with around 9.5:1 compression ratio, a decent cam with a 230ish duration @.050 and 480-490" lift, some slightly re-worked vortecs, a vortec bolt pattern hi-po dual plane intake (like the performer RPM) 750cfm w/ vac secondaries, and decent 50k+ volt HEI dist. some 3.73's and around a 2500 stall sounds like it would work well for your application, and get you low 400ish hp numbers but likely get you 450ish tq #'s
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Old 12-05-2009, 12:59 PM
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hmm ill think about it, my grandpa has about 15 old chevs on his farm (mine being one of them) theyre all just dying for rebuilds.
they range from 64 to 78. Its a sbc goldmine so i have mo limit to spare blocks haha!
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Old 12-05-2009, 01:07 PM
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man for guys like me that would be a gold mine, i would look at any of those trucks as a good project
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Old 12-05-2009, 01:30 PM
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Oh i know, what expensive hobbies we've picked hey?

what would be the proper way to balance the crank? in the block? pistons attached?
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Old 12-05-2009, 01:43 PM
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is there any difference between the gmc 350 and the chev 350
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Old 12-06-2009, 08:38 AM
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Quote:
Originally Posted by SBC-Torque
is there any difference between the gmc 350 and the chev 350

no same blocks, you want to have the whole assembly balanced together
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