what manufacturer produced the 455? i know it was GM and they use it in olds 442s, but did any other Gm manufacturer use it.

Think the 455s were Buicks.

Buick, Pontiac, and Olds. Same cubic inches, but different bores and strokes.

That is absolutely correct, BOP (Buick-Olds-Pont). All 3 made a 455, and each was a TOTALLY different block design. The ONLY thing BOP engines shared was the bell housing bolt pattern on the back of the block, which was totally different from the Chev bolt pattern.
The Buick 455 was a new engine design introduced in 66. The previous Buick engine design (the biggest was 425 with 2x4 carbs) was commonly referred to by EVERYONE as the nailhead engine. It could be IMMEDIATELY identified by its vertical valve covers (as compared to the traditional angled valve covers like most other V-8 engines). The Olds was a new design also introduced in 65 as the 330. The 307, 330, 350, 400, 403, 425, 455 Olds engines all had the same external dimensions (kind of like the small block Chevy engines). There was actually no small block and big block Olds engine. Instead, what Olds did to achieve a "bigger" block, was to increase the cylinder deck height about 1 inch on the 400, 425 and 455 engines. But everything else remained the same. As a result, the only real difference between the Olds small and big blocks, is that the intake manifold for the 400, 425, 455 engines was wider, because with a 1inch taller deck, the heads were a little further apart. Even though the 403 (new size in 77) is bigger than the 400, the 403 is a low deck and the 400 is a high deck block.
The Pont 455 block design was basically the same block design that was introduced with their first V-8 back in 55.
And as mentioned, all 3 had different bore/stroke sizes.
All 3 had their weak/strong points. When properly built, all 3 could be absolute torque killers, and when coupled with the right gear, they were known to frequently embarass a 454 owner! Their major short coming was that they were primarily conservative mom and pop car engines, whereas, Chevy continually pursued the performance aspect of development. The Olds was probably the most devastating low/mid range torque motor, but couldn't compete in high rpm. Plus, the Olds didn't have the beefed up bottom end like a BB Chev, nor, did the Olds have 4bolt blocks (maybe for 1yr, but I've never seen one and don't know anyone who has seen one). Also, Olds only has 4 head bolts per cylinder as opposed to 5 for the Chev.

The only four bolt Olds 455 that I am aware of was the W-43 Hemi that was slated for 1971 production, but never produced except for prototypes. I've got pictures of some of them somewhere from an article. The article said the Olds factory dyno was only good for around 500 hp,and the 455 Hemi easily went beyond that.

Also, Buick is the only one out of the three, B-O-P, to have a distributor mounted on the front of the motor like Ford, whereas Olds and Pontiac kept theirs in the rear.

GM's biggies!!

Chevy = 4.250" b x 4.000" stroke = 454.

Buick = 4.3125" b x 3.900" s = 455.

Olds = 4.125" b x 4.250" s = 455.

Pontiac = 4.151" b x 4.210" s = 455.

Cad. = 4.300" b x 4.060" s = 472.

Cad. = 4.300" b x 4.304" s = 500.

pdq67

the olds 455 2 bolt mains are considerably stronger than 2 bolt mains of other engine at the time