64 Chevy II bore to 4"

[doc396]

I have read "somewhere" that these 1964 Chevy II 283 blocks can safely be bored to 4". It has a steel crank and would make a homemade 302.

 

[skipxt4]

I think, they were 301's, Doc. They were FAST.

 

[1958 delivery]

Considering the amount of boring required ($) and the fact that a real early Nova 283 block is some what hard to find why ruin it? Just purchase a 4" block, relatively cheap still.

 

[Don Jacks]

Have the block sonic tested.There was talk that starting in about 62,the 283's were cast on the 327 block.I've never had the opertunity to verify that,however.Your big issue with building a 301[302] today is going to be pistons.The only ones availeable are for 11-11 1/2 compression on pump gas,not a good plan unless you're going big cam[no low end],Aluminum heads,or iron heads with larger combustion chambers,such as available with their Dart Iron Eagle stuff.

 

[RCampbell]

I bored a 65 Chevy II block to 4"

 

[63impalass409]

When I was in high school there was a guy in his 20' s that had a 64 or 65 chevy 2 or nova that had a 283 punched out to 301.5 or at least that's what he told everyone and it had a tunnel ram, gear drive and a 4 speed but he would race us all and usually won as he beat the piss out of that thing and didn't care how high he revved it.

 

[Dick MacKenzie]

Bore Stroke Pi #. of Cylinders
4.00 X 3.00 X 3.141592554 X 8
Displacement = 301.5928851 Cubic Inches

Chevrolet rounded up and called them 302s. Backyard mechanics rounded down and called them 301s.

 

[RCampbell]

I built a BB kinda like that...2.90 stroke...4.56 bore. Had a 9" deck height... same as a small block

 

[hamjet]

Early 327s had small journal blocks that the 283 crank would work in. just a slight boring to true up the cylinders and good to go..

 

[doc396]

I parted out the 64 Chevy II the engine came from, so no chance of matching number car still around. The engine was/is stuck, was running when parked, so I figure it will need a fresh bore. I hope its just the rings froze up? I have been spraying WD 40 in it every once in a while for several years.

 

[Don Jacks]

It'd be nothing short of a miracle if it didn't need boring when it was pulled from the car.Do you have the pan off to verify that it has a steel crank,because a lot of the 64 car 283's started using cast cranks about that time.

 

[doc396]

I think it was in the book by the numbers I read that 283 in 64 with mini balancer was a steel crank? It has the small balancer.

 

[La Hot Rods]

Interesting Don.
I have never seen a small journal cast crank.

 

[Don Jacks]

I never did either,James,but all my 283 based engines were eariler than 63.None of my 327's had a cast crank in them,they were all small journal motors.

 

[1958 delivery]

Just look at the parting mark on the crank flange , thin line is cast, wide/flat is forged

 

[63impalass409]

The 283 that is getting replaced by a 409 in one on my 63' s has a cast crank!! First one I ever saw as I thought all 283' s had steel ones. Runs good though and I only paid 25$ for the motor with a Holley 600 and edelbrock intake.

 

[nana1962409]

All small journal 327’s have forged cranks I have both cast and forged cranks in the 283 engines I have. I haven’t ever looked at the years or deck stamping to see what made the difference why some are cast and some forged though.

 

[oldskydog]

283's went to nodular iron cranks in 64.

 

[oldskydog]

The 721 casting is listed as being used for 283 and 327 versions. It was the 327 block in 65 and I believe it was also the block used in the 63 Nova fastbacks.

 

[doc396]