hey guys im lookin into buyin a monte carlo and puttin a 350 in it, anyway i was wonderin what were the limits of the 350 2 bolt main compared to the 350 4 bolt main hp wise? how much can eah handle and what are the benifits and disadvantagesof each? sorry if this is a dumb question but im tryin to learn as much as possible bout these engines and cars, ive tried serching but i have come to know for sure answer thanks guys!

 

For the street 2 bolt mains are just fine. 4 bolt mains are there to support a heavy rotating assembly and stabilize the block at high rpm operation. A factory block 2 bolt main SBC can easily be made to run to 6000 rpm. The key is good engine assembly techniques, proper clearances and good hardware (i.e, rotating assembly prep, good rod and fasteners, bearings etc.).

a lot of the 350 4 bolt mains were put into trucks. obviously, trucks were used to lug heavy loads, most of the time with a manual trans. the 4 bolt mains were used in these trucks to support the revving of these transmissions during shifting. so if you're putting a 350 in a monte, we are assuming you're not gonna be pulling heavy loads. likewise, if it's for mostly street use and maybe some strip, there won't be much high rpm operation (6000+).

there isn't much price difference between a 2 and 4 bolt main block and they both can be found quite easily, so if you are having doubts, just pick up a 4 bolt and be done with it. good question though! i don't think this has ever been discussed on this forum, since i've been on here at least.

 

I'm not sure of the years of the block but i know that some of the 2 bolts can be drilled and tapped to make it a 4 bolt and is actually stronger than the factory 4 bolt... either way 2 or 4

 

Bolt you are looking at a very reliable motor

 

Where do you guys pick up your 350s? I know someone who is looking for one for a '58 dodge rebuild.

 

Mike there is many ways my main way is junkyards or salvage yards, craigslist, somtimes you can find one's at machine shops that were abandoned there so they will sell it or call some machine

 

shop i'm sure if your friend would give them some buisness they would be glad to help find him a block or atleast point him in the rignt direction

 

Don't forget Summt Racing, Jeg's, Pace Warehouse, even Chevy as a source for a small or big block engine.

A friend bought the 350 fast burn engine from Jeg's for like $4200. He had to add his intake and carb. And I believe he told me he swapped the oil pan so he wouldn't have any issuses. But he bought one for his '34 Furd street rod and liked it so well he bought a second one for his '57 Chevy 4-door Wagon. Right before he retired.

 

I'll have to mention that to him, thanks

Back on topic :P

 

my dad has like, 7 of em in our backyard, lol.
is it a 58 car or truck? 58 dodge truck = awsomeness, lol.

hijack over