Thread: Stroking a 327

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Hey guys i was wondering how i would go about stroking my 327 to a 383. I understand the block size is the same and all that is different is the stroke length. i was also wondering what clearence issues i would have or modifications i would have to make for this to work.

Thanks in advance
-Mike

Hello Mike,
I can help you with that. It is very simple. You can buy a stroker kit and install it. They come in different stages of completion. They can be purchased in a kit ranging from just a crank and pistons, to a complete rotating assembly with crank, pistons, rings, bearings, cam, lifters, timing chain and gears, oil pump and gaskets. they can also be purchased with the flywheel and balancer.
I have just done two and am getting ready to do another. If you shop around you can get a complere kit for under $1000. The engine block will have to be bored .030 and clearances ground in the webbing of the oil pan sealing surface and in some of the cylinders at the bottom. Some kits have rods that don't require clearancing in the cylinders.
the 327 block is basically the same as the 350. What you would be doing is replacing the crank that has a 3.250 stroke with one that has a 3.375 stroke. Keep in mind that a 396, 402, and 427 all have a stroke that is 3.376. The torque is unbelievable.
Ed

I am not very familiar with the 327, but i think that the 327 block up to a certain year had smaller main journals. Im pretty sure that the crank's journals can be turned down. You might want to check into it before ordering any parts. Just my opinion.

That is very true. I was looking at his signature. It says his hot rod is a 1968 327 Camaro which had the large crank journals. You raised a good point though.
Ed

Hurst01,
Looks like you hit the 3 too many times when you posted the stroke of the 383 crank. It's 3.75 and for the big blocks it 3.76. Just a clarification so mrmike52 don't get confused.

In order to put a 383 stroker kit in a 327 block you would have to have it bored .30 over and have it line bored, a 62 - 67 327 is 2.300 mains and a 68 327 or a 350 is 2.450. Your rod Jornals on a 327 are also different on a early versus late 327. So if you have a 68 327 block then kewl....if not I would recommend a 350 block and use 305 heads, because of the smaller cc's.
Just my o2 cents worth

3.75 nodular scat crank good to 500 hp and 7000 rpm make sure u get the h-beam rods so there is no clearence issues around the connecting rod and the cam the only clearence issue there is with h-beams is around the oil pan rails. have the machine shop line bore the mains for a large journal crank so you can use stock std. bearings for 350 mains. I can vouch for the scat crank and h-beam set up but if you want the stroke get the bore and go 400 sbc

kyautomator,
The 305 heads are not a good choice for a 350. They also have a strong tendency to crack. I have used them on 350s in the past, but I have had to replace a bunch of them also.
Ed

Yes my engine is original, 1968 327 and i am having the block bored. I didnt know about the rod clearence but thats why i came here . Thanks alot for your help guys and i cant wait to feel the torque!

-Mike

Hey guys i was just wondering, i called summit's tech department and asked them to recommend a stroker kit for my engine, and the tech guy preceded to tell me that the 68 was a small journal, so i guess im out of luck
-Mike

All is not lost just get 350 block. 4 bolt main. The torque is unequalled by everything except for a big block. a 383 with a pretty big cam and about 10.5:1 comp with a perf. rpm intake is unfrigginbelievable <that is a word by the way...i made it up lol, anyway you'll really be glad you did.

Originally posted by mrmike52
Hey guys i was just wondering, i called summit's tech department and asked them to recommend a stroker kit for my engine, and the tech guy preceded to tell me that the 68 was a small journal, so i guess im out of luck
-Mike

Call the Guy back at Summitt and tell him to try a new profession. He's not very good at the one he's in.
68-73 casting #3911001---327 and 307 was a large journal crank.

The guy at Summit was wrong. 67 was the last small journal crank. 68 had the large journal.
When you get ready for a stroker kit let me know and I will find you the most complete kit at the best price.
Ed

Hey guys, yea i called up jegs not satisfied with the tech at summit. He told me that it was definetly a large journal, and i called back summit got a different person and same answer. He definetly needs to find a new profession. Sorry for the confusion, and Hurst01 if you can find me a complete rotating assembly that would be awsome. My e-mail is Mrmike52@optonline.net.

Thanks!
-Mike

He man Just build that 327. That is a fantastic motor