leeband85

I've got a an 86 camaro with a worn 305 engine that Im trying to restore. As Im looking around at connecting rods I notice that some listings say 'large journal' and others 'small journal', what does that mean, whats the difference?

also, if anybody could tell me what the stock CC's for the cylinder heads on said 305 are, that would be helpfull.

creepingdeath

Put your money into a new engine

Sonix

iTrader: (1)

It's really hard to justify rebuilding a 305. I'll give you the long winded response;
For just a few bucks more you can upgrade the block to a 350 block. Lets say it costs you $100 for a rebuildable core. Now you put the same aftermarket parts into it that you were going to put into the 305. All same parts, all same machining, you just threw in the $100 block. Now once it's running, you've got 30-60HP more, purely due to the extra cubes. Lets call it 40HP. 40HP for $100 is the CHEAPEST horsepower you'll ever be able to buy, and it's super easy. It's silly, downright D-U-M to *not* upgrade the block at this point.

Now to get back to your question. It's large journal. Small journal was for old 327's and whatnot, pre 1969 type of stuff. That's referring to the diameter of the "journal" on the crankshaft. The size of the bearing area.
400 blocks used a large journal, 350's and almost all SBC's used "medium" journals and old 327, 283's and whatnot used small. It's a little confusing, but typically they refer to it as
283 etc - small
350 - large
400 - 400 size
I'd double check on that one before you drop cash on it, i'm a little hazy on it.

Most (probably ALL) 305 cylinder heads have 58cc chambers. You most likely have 416 castings, those are 58ccs.

leeband85

k

Token

I agree. Spending all that effort removing and rebuilding, then reinstalling a 305 would be absolutely retarded.

impaled

sadly i agree with getting a 350. i had an 1987 4bbl 305 and it made like no power. the camaro i have now has a 350 and the difference is huge (even though my 350 is running extremely rich). it really isnt that much more work or money to go 350.

i totally agree with sonix, changing the block from a 305 go a 350 would be the cheapest horsepower you could ever buy and you will not regret it.

Bobby_80s

iTrader: (2)

so lets say my 305 craps the bed. how much would it be to rebuild and upgrade to a 350? and assuming i want this doen quick and buy a garage how much labor included in that amount?

Damon

GM 350 "Universal Replacement" long block for $1200- 250HP rating. Bolt on everything from your motor (stock intake, carb, distributor, etc.) and go have fun. You can't rebuild your 305 for much less than that. And it's a great motor to do upgrades to when you have the funds- better heads, bigger cam, etc.

I'm assuming that your 86 has the carbureted LG4

Token

I built the engine in my sig for approximately $2500
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