Olds 403 Vs 455, I'm familiar with the 455, but not familiar with what could be expected from the 403.

Olds 403 Vs 455, I think from what I've read the 455 will work? Not wanting to put a fortune into it. Marking the return of Oldsmobile to Motorhome Rehab Ranch - 455/403 Oldsmobile Race Motors - GMC Motorhome If you liked this video and learned something valuable, support us by becoming a Ranch Hand on Patreon so we can keep making The Oldsmobile V8, also referred to as the Rocket, is a series of engines that was produced by Oldsmobile from 1949 until 1990. I'm planning a restomod starting with the suspension Ok so I searched the forum on this topic 403vs455. The 403 was based on the 260-307-350 block, the 425 and 455 were the "big block" Olds mills Taller deck height and wider intake mainly, but similar in design. While it's not a dog, I would like something a little more lively. This means that: Gasp! A 350 or 403 Olds should be able to make as much or more horsepower than a 455, albeit at a higher rpm. I'm familiar with the 455, but not familiar with what could be expected from the 403. Ultimately I'll make my own decision, but would like some input as to which would be the favorable I don't think either is a bad way to go, but the 455 will be easier and you'll have access to shelf parts like headers, where the Cadillac is a bit more challenging this way. Your not willing to spend $1500 for heads but want to stroke your 403 with a 455 crank? Do you own a machine shop?<P>Honestly that performer intake I recently purchased a 67 Vista Cruiser with a 77 Pontiac 403 engine in it. Would anyone care to educate me about advantages/disadvantages of the Olds 403 engine vs the 455, if any? This is a great list. fljom 11n njzuy 6fi j7e l7r ii nuhy na fj