Thought it would be a good idea to start a thread that contained drawings with engine dimensions. If any HAMBers have some, please post them.
Here are some Bellhousing Dimensions that were taken from actual bellhousings rather than factory drawings, so there may be some variation. Note: I had a couple of errors in first dwg and Thanks to Hnstray for catching them and pointing them out. These were done at work about 30 years ago, so I apologize for the Brainfart on such a simple drawing............ View attachment 4512446
@ekimneirbo ......The last two, Chevy and BOP, I believe have errors as posted. The locating dowels on both should have the same horizontal spacing .....yet they are shown as 7.69” for BOP and 7.58” for Chevy, if I am reading the diagrams correctly. Likewise the bottom bolts should also be the same spacing for Chevy and BOP......yet, the BOP indicates 7.80” and the Chevy 7.69” (all in reference to vertical centerline). Also, vertical spacing from bottom bolts to locating dowel centerline should be same for BOP and Chevy, but are shown as different. It has long been my understanding those are shared dimensions and only the bolts above the locating dowels differ between BOP and Chevy patterns. Am I missing something here? Ray
200 inline Ford six plus the 240 and 300. The 302 W Ford Ford must have been stingy with sharing the drawings or no one found the need to share because they are not easy to find. So spread them around. That 4.40 degrees crank angle is very important and not shared in doing OEM swaps, go for it......
Chevrolet V8 (all) from 1955, Chev 6 194/230/250/292 from 62/63 ......BOP from ‘64/‘65 Buick V6/300 V8....’66/‘67 up for 340-350-400-430-455, Pontiac from ‘63 326/‘64 389....350/400/428/301...Olds from ‘64 400 and later 425/455 derivatives . One could quibble with exact years of some displacement intros, but this is “close enough for government work”..... Ray
Thanks for catching that Hnstray. They were some old drawings I made many years ago while sneaking the bellhousings into work and trying to check the locations without the boss coming in unexpectedly. We had precision inspection equipment so have no idea why I screwed it up........but I did.
OK, I think I can wriggle part way out of the two mistakes I made on the BOP bellhousing dwgs. First one is the one HNstray mentioned about the 7.80 dimension vs the 7.69 /7.58 dim. Both BOP and Chevy should have 7.69 for the locating pins. Then I should have added .11 to that for a7.80 on both patterns. So they are the same as Hnstray said. I even went out and put a Chevy bellhousing on my 500 Cadillac engine to verify it. The 1.61 Dimension on the BOP bellhousing pattern is a little different story though. Even though the bolt holes below the alignment pins on my Chevy bellhousing align with the Cadillac bolt holes (1.88 dimension), there apparently were some differences in some of the BOP housings depending on what engine they were on. I measured an actual bellhousing, so I couldn't figure how I came up with the 1.61 dimension 30 years ago. So I found that Wikipedia says this: Though the pre-3800 rear-wheel drive (RWD) V6 uses the Buick, Oldsmobile, Pontiac (BOP) bellhousing pattern, an oddity of both the front-wheel drive (FWD) and RWD 3800 V6 is that although it is a 90° V6, it uses the GM 60° V6 bell housing (Metric Pattern). For use in the FWD applications, the bellhousings on the FWD transmissions are altered slightly. I have a factory drawing of the rear of the Buick 3800. If you subtract 2.96 from 4.57, the result is 1.61 which co-incidentally is what I measured at the time. So the best that I can come up with is that the bellhousing I had at the time had the complete BOP dimensional pattern except for the two bottom bolt holes.
Great thread. Anybody got drawings for Ford & Lincoln Y-blocks, FEs, MELs (383, 410, 430), or Off-Topic 335s (351C/M, 400) and 385s (429, 460)?
Good diagram showing case, mount pad and tailshaft. Any similar ones for Ford/Mopar slushboxes and popular manuals ?
Wow, this is a great thread. Thanks to @ekimneirbo for starting it and everyone else who provided info.
Something a lot of guys will find very useful is this old Petersen Publishing book. Found on Amazon used for under $10. https://www.amazon.com/Petersens-Complete-Book-Engine-Swapping/dp/B000ZG4HGM I've had this book since the 70's and refer to it often when I'm considering an engine swap, and need some details on measurements, and adapting. It's still a very good book for beginners, or even some who are a bit further along in this hobby.
The Jalopy Journal
