All in all, not really. The biggest difference is about 5 cc of engine displacement which equates to about a .1 drop in horsepower from the 460 to the 455. With all other specifications being close enough to go unnoticed (weight 12.8 lbs for the 455 and 12.79 lbs for the 460) and most being the same (fuel and oil capacity). But, one bigger difference would be the price with the retail price of the 460 at about $50.00 higher depending on where you purchase.
460 horsepower
Really big.
There is no such thing as a small block or big block Pontiac. Outside dimensions are all the same from the 326 all the way up to the 455. The only real difference in the blocks is the size of the mains. The 326-400 run a 3" main...while the 421-455 run a 3.25" main. If you are "comparing" it to say a small and big block Chevy.....dimensionally it falls in the middle.
68-72 Oldsmobile big block 455
no 351 windsor engine is small block. 460 is a big block
ford 460 big block
A 460 big block.
455 c.i.d.
Since there are 9 square feet to 1 square yard,460 square feet = 460/9 square yards = 51 1/9 square yards.
Yes i Don't know how many Oldsmobile Cutlass 455 were made but it wasn't as many as the Oldsmobile 350 Rocket. So it was a big plus if you had the 455 engine because it wasn't as many around.
the 403 is a smallblock with a big block bore. the bore is actually bigger on a 403 than it is on a 455
There is no "small block" , "big block" with Pontiac engines. The physical size is the same from 326ci to the 455.