i have a large journal 60's 283 block that is good......i also have a 307 large journal good crankshaft and .060 pistons and rods from the 307 engine....bad 307 block.....will the 307 crank and rods fit in the 283 block without any crank clearance problems......i'm sure someone tried this before.......please let me know.....thank's, charlie.......
No such thing as a large journal 283. Also no such thing as a small journal 307 so that crank won't drop right in without machining the mains on the crank. You have some bad info. Double check casting numbers, suffix codes, date codes, etc. and get back to us.
Just curious, what the casting, suffix, and date code numbers on the block? far as I know 283 is small journal, made thru 67, 307 is large journal, starting in 68, same bore for both.
Since there were no large journal 283's, what you can do is find a small journal 327 crank and use those 307 pistons in that 283 block. Chevy did it, only it was done in large journal crank. 307 and 327 share the same stroke. 283 and 307 share the same bore size. The only way you could possibly come up with a large journal 283 is to use a 307 block and a 302 crank both large journal of course. Then use the 283 pistons. I don't know anyone who has done it however.
Woops, brain was elsewhere. 283 stroker is a 283 block with a small journal 327 crank. I prefer the 327 block with the 283 crank. Either way, what you say you have doesn't seem to exist. Post up the casting numbers and let's see what you have!
Good way to tell a 283 block is that they have an extra little fin or hump in the front under the intake.
The '68 307 was the replacement for the '67 283. Same bore, longer stroke in the 307. For all practical purposes, everything before '68 was small journal, and everything since has been large journal.
Except 67 Camaro 350s. They were large journal. They were also the only Chevys to get the 350 engine in 1967. Chevy came out with the large journal cranks because of the longer stroke 350s and then changed all the smallblocks to large journal in 68. Just a useless tidbit of Chevy smallblock trivia.. Something to do with there not being enough meat between the rod & main journals on the 3.48 stroke cranks.
I have a 350 block with a 307 crank [large journal] in it. That makes it a 327. I discovered on MORTEC some of the early 350 block castings were also used to build factory 327s. Tom T
thanks guys, guess i'm getting too old for this engine building stuff......i really thought i had a great idea.......lately, everything i touch turns to stupid mistake.....charlie
pick up the MARCH 2010 issue of hot rod deluxe.it has a great article about biulding a 400hp, stroked 283. maybe this will help. good luck.
No reason to be a Danny Downer. What are the casting numbers? You might still have something that may work.
No doubt!! All you need is a small journal 327 crank and you can build the stroked 283 using the 60 over 307 pistons providing the 283 block is not 60+ over. Pick up this months issue of Hot Rod Deluxe and read the 400hp 283 story. You don't have to get as radical as they did but you could build a great running 283 for not much $$$$$$ using a lot of their ideas. Of if you just want to give up on it, ship your stuff to me and I'll build it....
I know I am late, very late, with this post. I did this back in 2001 to a 283. Had all the block work done and turned down the counter weights on a 327 crank. Using 461 heads that have been opened to 202's. Running a split dur and lift solid cam from Doug Hubberts. Stayed with a 650 carb and this thing likes to run. I would not suggest going that large (.125) of a bore on a 283. They will not last! This is installed in my 68 Chevy c10. Every cruise I go to people ask me what I'm running. The thing is a lil monster. I just tell them it's a 283....LOL!!! After all said and done I light them up on the way out. Love this combo.
Oh, By the way! If you do the math with this combo it's not a 307 like most people think. It turns out to be 311 c.i's with some change! Just saying! Math doesn't lie. Check it out yourself!
Unless you have no other options I would not throw a 327 or 307 crank in a 283 block. It is not a good combo even if you get the compression up. A 302 crank is just a large journal 283 crank, most of the time they are too valuable to use to build a 283. More often than not they get thrown in a 350 block to build a 302. No reason it won't work but not the optimum build to use it to build a large journal 283. If I had a small journal block I would do my best to build a small journal engine there is less bearing surface load in a smll journal block. Far better to build a high revving engine with a small journal block. Never the less this does not answer the question. Yes you can stuff a 307 crank in a 283 block and build a 307, you will need to get the mains turned down. If I recall when we used to stuff a 283 with a 327 crank we had to clearance the bottom of the cylinders slightly. But it may not be a problem with a later block. Only way to know is to pre-asseble and check the rotateing assembly. If you need to clearance it it is just a matter of pulling it back down and taking a dremmel to it, you will not experience cam clearance problems like you do with some long stroke applications. I think that TRW still makes pistons for the app that are higher comression than the stock 307. One of the things that hinders a 307 is compression ratio. I personally don't care for the bore to stroke ratio, I prefer an engine that is bore heavy as opposed to stroke heavy, but a lot of fellas swear by strokers. It is just my own personal preference. No help right?
I know this is an old thread but it seems to be where I need to ask this question. I have a small block that came from my grandfather's '68 Chevy 1/2 ton with a power glide. He bought it new. It was the original engine and has never been apart. It was replaced with a 327 in the late '70s and I have had it in my shop since then. Block casting #3896944. My book says '67 283. Head casting #3884520. My book says "66-'67 283, 327 60cc. The stamped suffix code is V0104WF. That is Flint Engine plant January 4, and would have been 1968. The WF code chart is below. Code Year CID Vehicle HP RPO Trans Carb Comments WF 66 283 Truck 175 L-32 Manual 2-Brl WF 67 283 Truck 175 L-32 Manual 2-Brl WF 68 307 Truck 200 L-14 Power glide 2-Brl WF 69 350 Truck 215 Base Manual 2-Brl Allison To be in a '68 with a power glide it would have to be a 307 but all 307 cranks had large mains and all 283 blocks had small mains. '68 was the first year of the 307 and this one was put together on the 4th day of that year. Could it have been put together with a small main 327 crank? Or is it more likely the '68 WF code also covered 283 autos? I don't want to tear it down until I'm ready to build it but I guess I need to pull the pan and get a crank # or pull a head and measure the stroke. At any rate it will be a nice backup engine for my '26 Chevy roadster.
Six ball, you can look at the end of the crank, where the flywheel or flexplate bolts on and look at the shape of the flannge. That will tell you what the stroke is. I don't have it handy, but some searching and you should be able to find the chart.
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