i just purchases a 350 block form gm performance parts(10105123). it has 4 bolt mains and a 1 pc rear main seal with a 4.00 bore.

what do i need to do before i can start installing my rotating assembly?

do i need to bore it?

 

hell no

 

ok so i dont need to bore it and iknow i need to install the frost plugs but what else needs to be done before i can start installing my roatating assembly?

 

Check the cyl. bore and mains for proper dimensions and clearances for your rotating assembly. Depending on your pistons the cylindar might need to be honed a little more to make room for expansion. Check the manufactures recomendations for clearances and then proceed from there. Clean any dirt or debris off the block. Did it come with cam bearings??? If not install them. Install the oil plugs and freeze out plugs and build your engine.

 

I would suggest going to a local book store and buying a couple books on building a small block chevy. Since you're a beginner, you could learn a tremendous amount from those books. You'll at least become familiar with all of the internal components and their purpose, as well as the proper installation procedures.

 

bearings did not come installed in this block i looked in summit and their are a bunch of different sizes what size would i need?

 

Get a set of standard size cam bearings for a SBC. They should be listed as such. It's also easier to put your cam in if you work from the bottom of the block with the rotating assembly out.

I agree with Jim's advice to go pick up a book or 2 on engine building before you start throwin parts together.....there are a lot of little tricks that will make the job easier, as well as things to watch out for.

 

could someone find the right bearings on summitracing.com for my 383 im looking for the clevite77 high performance cam,main and rod bearings


eagle forged craknk 3.750
eagle esp rods- 5.7
2.10 rod journal
trw pistons

 

http://www.sdpc2000.com/htm/techtip.html

look at the tip that says sb chevy blocks - oilling crisis

 

does it make a difference if i bore the block .030 and put in .030 pistons or leave the block a 4.000 and install standard pistons?

 

Dude, you really need to buy a book and start educating yourself on the basics. I don't want to sound rude, but you don't have anywhere NEAR enough knowledge at this point to even consider picking up a wrench. By reading you'll begin to understand what all this stuff is, what it does, why you need it, how it works with the other parts and how to install it. It's not that we don't mind answering questions for you, but it's obvious that you have a ton to learn, and by reading the books & magazines, you'll have your basics covered and you can start asking questions that will stimulate some interresting discussion.

To answer your question, a .030 overbore will give the car a few more cubic inches, which will translate into a couple more horsepower, but not only is it nowhere worth the expense, but it also limits you down the road. You've got a perfectly adequate fresh 4.0" bore block. Don't screw with it. Keep as much material there as possible, that way next time you need to rebuild it, you'll have enough material left to bore it as necessary.

 

-----agrees with Jim on all counts.


Don't bore the block you may need to have that option later. And for the sake of the engine gods READ before you build.....if you don't you're gonna miss something and that motor will throw a rod after about 8 minutes at idle.

Not tryin to be an ***, just tryin to save you a motor.

 

will the block still need to be machined after i recieve it from the factory or will it probably be ready to instll the rotating assembly?

 

.....also agrees with Jim


Read the books and find out what kind of bear block you ordered. Some of the GM parts needs additional work. We have a set of GM cast aluminum bare heads and they are really bare. They need 4 of the push rod holes milled, valve guids installed, valve seats installed, spring pockets machined and every thing put together. Find out what your getting before you do anything and READ!!!!

 

If the block already has a 4.0" bore, then no machine work should be necessary. If machine work was necessary, it would come with a slightly smaller bore size so that it could be honed to 4.0".

But when in doubt... ask the people you bought it from!!!!!