The first one was used from 55-57 and the second one was used from 94-96. They are not similar.
The small block Chevy was designed in 1954, by a man named Zora, Arkus, Duntov. The 350 evolved from that 265 cid engine.
The 350 engine was introduced in 1968. A 1955 small block would be a 265 or 283.
Although I do not know the answer you need to be more specific. There is more than one small block Chevy. There is the 262, 265, 283, 302, 305, 307, 327, 350, & 400. All of these were small blocks made at different times, but they do not all weigh the same. The basic block weights approximately 181. The weight differences through out the years for the bare block did not vary more than a few pounds.
That would be the very first v-8 Chevy made. 265 CID engine. It will be hard to find. The good o 350 engine is a good 1 to modify also. IF DOON RIGHT.
327 is a Small block. 265 thru 400 were small blocks but to confuse you more the 396 thru 454 were big blocks. Unless you really want to be confused, I won't mention the 348 was a big block. :)
Yes, you will have to put engine mounts in, original 265 had mount on the front of the block. check with cliffs classics or danchuck.
If you're referring to the horsepower of the Chevy 265 that's in the 94-96 Caprice, it's 200 hp. The Chevy 265 V8 installed in the 1955-57 Chevy had 162 H.P.
If that 55 originally came with a small block 265, the 73 350 would drop in. If that 55 had a straight six, nothing would bolt up to the 73 350.
1 year = 365.25 days (approx) making allowance for leap years.Therefore 265 days/1 year = 265 days/365.25 days = 265/365.25 = 26500/36525.
The 265, 283, and early 327's, did not have one. EVERYTHING after 69 had one. I have heard of them comming out, but, not usually without catastrophic damage to the radiator. Who ever assembled it, could have forgotten to put it in, as the harmonic balancer, presses on pretty tight.
265/40/22 is perfect or 265/35/22 for a little shorter sidewall.
6 cyl has 265-280