170 200 flywheel swap

Does any body know if a 170" six flywheel has the same bolt circle as a 200" six :
Im swapping out a 170 for 200 but the 200 came with a automatic and a flexplate. I need the flywheel off the 170 because my van has a three speed.
Thanks for any info.

Should be identical. Use the slightly longer (by ¼") flywheel bolts when you swap over.

62GOLDENRODVAN, I am using the stock flywheel on my 64' Econo that orginally had a 170cid engine. I have a 66' 200cid engine installed in the van using that stock flywheel. It is a 8.5" dished flywheel, and has the orginal 3.03 transmission; so I am not sure about the automatic trans. Jim

Thanks guys,
I just wanted to know if the crank flanges are the same and if they are
interchangable. Or if there would be any balancing issues between the to.

Thanks again,
Im still learning about the little sixes.

james singleton":1ka82145 said:

62GOLDENRODVAN, I am using the stock flywheel on my 64' Econo that orginally had a 170cid engine. I have a 66' 200cid engine installed in the van using that stock flywheel. It is a 8.5" dished flywheel, and has the orginal 3.03 transmission; so I am not sure about the automatic trans. Jim

Click to expand...

Jim, how well does the 200 work in your van does it have enough power :

62GOLDENRODVAN, As far as power goes with the 200cid in my van, I would say that since I am not a lead foot anyway, I have enough power for my needs. Also with the early Econolines they were not designed with high speeds in mind on the freeway! The way people drive on the freeways here in S.Cal - FAST; I pretty much need to stay in the slow lanes. I don't drive much on the freeways with the "Old" (64') Econo anyway. Orginally I had a 4:11 rear end that made my van feel like it was screaming at 55mph; so I installed a 3:50 rear end quite some years ago. It is much better, and I believe that from reading other posts, that you can definitely go to a 3:25 or possibly a 3:00 rear end. My van is a 64' "Heavy Duty" model and has a 9inch rear end. I actually drove my van from S.Cal up to the State of Washington and back quite a few years ago, with my previous 200cid engine, and it wasn't too bad. Of course people are driving even faster now! So to answer your question, I think the power is plenty for the limits set forth by the drivability of these "Old Vans" and dependent on which rear-end you have installed! Just my opinion! Good Luck! Jim

Thanks Jim,

That is why I dig my little van, slow down a bit and enjoy the ride of yester year.It is a lot less stressful. 8)

62GOLDENRODVAN, I hear ya!!!!