TRW used to make spacers to put a small crank in a large block.

Large journal forged 327 cranks reportedly only came in trucks and Corvettes. But, I've heard of all kinds of weird stuff coming off the assembly line.

Some friend he was. Yeah, we've seen some strange stuff like that over the years and after watching old videos of them assembling engines back then nothing surprises me anymore. It was still done by hand and they were on piece work so to some guy "on the clock" a 327 crank was a 327 crank, forged or cast if it was in the parts bin for that motor in it went. Time was literally money to those guys and as long as it fired and ran correctly that's all that mattered. I worked on a piece work line so I know.......

Hello every one, I happen to be a old time drag racer from way back and i do happen to no that if im right the 307 also carrys a 327 crank in it in 1970 and it is also a "large" Journal crank if that helps you. and if im right i happen to have a few of them if needed let me no. Thanks Again " PaPaBigBlock

Another one of those amazing retro threads. This thread was hatched 5 years ago, then again 3 years ago. Look at the dates before you post.

I've seen more 302 cranks in my short life time than large journal forged 327 cranks .
I agree though, 327 all day long but then again with the stuff that's out there, a properly prepped 350 short block will turn the rpms too for less money than the SJ stuff.

I think if you google 'eagle chevy 302 crank' that a speedshop out of FL sells a 3" stroke crank- 4340 for $600, same for a 3.25" crank.

307 is a 3.25" stroke but I'm sure they are all cast. And I have no problems with cast but once you put the money into a relatively high rpm build then you might as well fork over the dough for a better crank, in my opinion anyway.

But as we all know a cast crank, late model PM rods w/ ARP bolts and hyper or forged pistons will take 6,500 any day and higher (but I wouldn't feel too safe past 7,000).

This story could be pure BS because I haven't seen it, just the tach recall, but my friend runs a 1/8th mile car with a GM 'Delux' 330 hp crate motor. He took off the vortec and hydralic cam and put on Dart Iron Eagle 220 heads w/ 49cc chambers and a huge solid lifter cam. The tach recall showed 8,100rpm on a stock short block.

Man don't I feel like the idiot dv? Just saw your post after I posted... I was wondering when I saw people talking of a DZ crank only costing $400... I was like, hell, I'll take that all day long!

Ah man, no need to feel like that. No harm no foul. Sometimes I wish those that post would pay attention to the dates is all. But I did see he was a 1st time poster so it`s over looked. Believe me man, your not the only one who wishes they could turn back the clock. If I could only turn it back to 2000 and know then what I know now. But it wouldn`t be for automotive reasons.

I find your kind very funny young man,when some one is trying to help others close your mouth and learn some thing maybe if a man of your skills would have posted this i would not have had to. Next time young man eyes open and mouth closed and you may learn a few thnigs,

This may be an Old Threaded But it's a Good one . Yes that 307 Crankshaft is a L/J 3.250" Cast Crank Just Like the STD 1968-69 327's Used . I think if you Built a 327 Part for Part Like a DZ-302 . You will have more H.P and Torque .

You can use special bearings to install the small journal crank in the large journal block.

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So let me ask, I just bought a 1969 camaro 4sp with a 307. are you saying that my motor has a large journal? god i hope so because i also have a 327 block with numbers matching 2.02 heads from a 69 DZ 302. Will that crank i have work in my 327 to make my dream engine 302?
Paul

307 and large-journal 327 use the same crank. If you have a large-journal 327 block, the 307 crank will work in it, using 327 pistons, but you won't have a 302, just a 327 with a cast crank. Which is not at all a bad thing, it's just not your dream motor.

hey thanks alot. i did not know that the crank would work. I have recieved alot of informaition to make my motor. I might be going another route that would encompass the crank with aftermarket heads with a complete roller set up.
Thank you
Paul

forgive me for being stupid. this is the first i have to answer all of the info you all have given me.
Thanks to all
Paul

The Dz motor was a nice " Little Motor Thats all it was stroked this solid that. You always remember this you can NOT beat cubic inch If i were you i would take the crank out of the 307 put it into the 327 block with a 30 over bore that will make it a 331 a nice set of pink rods or better a set of 492 angle pluged heads make it around 9-1 the heads will bring it up a tad use a team g intake or a jr use a nice solid cam not to big and a 650 dubble pumper you will be living in sin. run a stick maybe with a 355 gear. I hope this helps someone Thanks again.and you can run a auto also 350 or a 400 or even a 700r4 with the 355 don't matter. and for ign nothing beats a MSD nothing " PaPaBigBlock