Thread: 305 or 350 to 383...

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I'm wanting to start a 383 stroker project but I have some questions. What is the difference in the block with a 305 and a 350? Can a 305 be machined to accept the crank, pistons and rods of a 383 stroker kit or will I just need to find me a good 350 block and go from there?

I have a line on a good 305 for super cheap and 350's are really hard to find and/or too expensive for me...

Thanks guys...

Well, to do a 383, you'll need the 350 block. The 305 with a 400 stroke crank only gives you like 334 I believe. They make specific kits for that. The 305 is about a 3.5" bore while the 350 is a 4" bore. roughly. You might wait awhile and see if gas prices still keep people a little antsy about building big motors and if the 350 doesn't come down some.

Yep, a 0.030" overbore 305 (stock bore 3.736") with a 3.750" crank makes a 334. I don't know what it is that you're trying to do with the motor, but if I were looking to build a stroker, I don't think I'd start with a 305 block.

Thanks guys...I'll probably just hold out then and try to find a good 350 block.

BigRed,
If the 305 is a late model roller motor, it will make a good stroker motor because of cam selection (roller cams) and should be able to produce at least 400 hp. If you want more hp, then the 350 is the way to go. You can use the same crank, rods, flywheel and balancer in either motor (rear seal is the difference, one piece or rope type seal), the pistons are different size.
Just a thought
Jim

The 305 is in an older truck...probably an '82-'85 Chevy half ton. Probably not new enough...but for $200 it seems like a pretty good deal. What kind of trans came behind those...Turbo 350?

usually th350's in the pickups....

BUT $200 for a 305 CORE is high!....
You should be able to find a 350 CORE for that ca$h....
I'm in ft worth... if you want, I'll keep my eyes open for you!

Really? $200 or less for a 350 core? Yes, keep an eye out for a core, short or long block or a complete engine for me. I don't know why 350s are so expensive here...???

I did find an old Buick with a 350 in it for $800. It's torn to shreds inside and out, but the old lady that owns it won't budge on the price. She still thinks it is in the same condition that it was when she parked it in her front yard...12 years ago!!! Oh well...

BigRed,You're right if the 305 came out of an older truck, it is not what you want. If you want a 305, I have a '90's model crate block with about 3000 miles on it. It is just the block but is roller cam/one piece seal. I also have some other parts, zz4 roller cam and kit, Camero surpentine belt system, TPI and chrome block hugger headers. I am in Oklahoma City working right now, but go home (Granbury S/W of Ft. Worth about 30 miles) every 2 weeks or so. Just for your info.
Jim