That's what I found..... 53 to 56 has a different bolt pattern (bellhousing size) that will not bolt to a 57-66 engine.
True, but an earlier Dynaflow bell housing and converter can be bolted to a later Dynaflow in place of its smaller housing. Wala, closed driveline Dynaflow on an early 53-56 Nailhead. Didn't you fellows read my earlier posts, or do we just read the last ones and reply? Cheryl
hi cheryl. with advice taken, im looking for other options. came across 1966 300...how could that transplant in the rivi work out if i put it on front of the ts 400? thx vito
Ahhhh.... I forgot the Dynaflows had removable bellhousings! The '300' engine will not mate to a Nailhead transmission unless you find the 1970's Jeep adapter. 300 has the conventional Buick-Olds-Pontiac trans bolt pattern. It will work with a '67-up ST400 trans.
Vito, We know there were three different drive lines put in the same basic X frame under the Riv from 63-67. All of these already exist in packages that fit the frame depending on the year. The first was the 401/425 and dynaflow in 63, then the 401/425 and ST 400 from 64-66 and then the 430 and ST400 in 67. The 430 was the same size and used the same mounting as the 67-69 400 and the 70-76 455. In 68 the frame changed entirely (kind of like how the A-body frame also changed in that year). Each of the three drive lines in the first generation Riv used different mounting points, frame pads, motor mounts, bell housing/flexplate combinations and in some cases cross-members, drive-shafts and exhaust . In some the wiring and radiators were reversed. But, at least parts were available to install any of these packages in any of these years like the factory would have. The problem with the 300 is that it was never installed in the Riv. There may be mounting pads and mount from other GM brands that used the X frame from similar years, but I don't have that information as to if there was an Impala that had a V6 that used the same mounts and frame pads as a 300 would in the Riv. I also don't know if a Le Sabre from 64-67 (used the 300 and 340 engine) would be similar enough to the Riv frame to use those mounts and pads. The 300 also had a smaller bolt pattern for its converter drilled in the flexplate. I cant recall if any 300s had both large and small bolt patterns drilled in the flexplate, but I think that was only the 340. The 340 was used with the ST 300 and ST 400. I also think you would need a mid sump pan like the early Rivs, but know the 300s were rear sum in the A-bodied and maybe the Le Sabre as well. I guess from my perspective, it would be easier to use a wheel that already exists then to reinvent one? Cheryl
its a 64,they came std in 64,63 only had 401 and nailhead,64 trans first year fo sp but its different than following years,yoy can look for these things to see if u have a 64,oval emblems in the tail lites standup hood ornament L1L2and drive on the shift prindle,large center hubcaps
