455 in a 83 Hurst swap

[DoubleV]

As far the swap the 403 is the same size ad the 307 but the 455 is taller. There will be more mods needed for the big block but it cam be done.

No mods beyond the basic Olds V8 mods were necessary to fit the 455 in my car. Even with an Edelbrock Performer it fits under the factory hood insulation using a 3" drop-base air cleaner. Notched valve covers might be convenient.

Some would consider being forced to use a different air cleaner than what they have and notching their vc's to be mods that must be done to make the swap work.

Yes exactly no major mods needed I was just saying its a Lil more work compared to a sbo.

I'm saying it's ZERO additional work compared to a SBO. If the car is prepped for an Oldsmobile V8, it doesn't matter if it's a 260 or a 455 when you drop it in.

Really? Were you able to re-use your stock sbo fuel line to the carb? What about the AC compressor brackets? Was that a direct fit too? Did you reuse all your sbo belts? Mod carb to work right with the bigger engine?

So what you're really saying is that there are more than 'ZERO' things one must take into account when doing the swap right? Sure, they may not be big things to worry about and some may not even apply, but they are things that people should be made aware of and saying 'ZERO' additional work is a flat out blanket statement that could cause some major headaches for those who weren't prepared to deal with them.

 

[hurstguy]

[*]Gentlemen, Thanks for all your posts.
This is clearly the best web site so far. I had posted the same question on Olds power and Classic Oldmobile and for now had very little feed back.

Now I have to get Gonads, the $$$ and the 455 in hand .

Anyother posts would be helpful before I malest an all orig. 37k mile beauty. But honestly at cruises and car shows I dont even lift the hood. The 307 is a smooth reliable motor but theres just too much junk covereing the motor. I'm not into dragging or insane HP but the Hurst/Olds partnership was suppose to marry performance looks and comfort, like the 68-70
No other GM offered all 3. Chevelles are nice but a bit boring .Maybe a Buick GS stage 3 offered this but super rare.

On that note thanks again

 

[Intragration]

As far the swap the 403 is the same size ad the 307 but the 455 is taller. There will be more mods needed for the big block but it cam be done.

No mods beyond the basic Olds V8 mods were necessary to fit the 455 in my car. Even with an Edelbrock Performer it fits under the factory hood insulation using a 3" drop-base air cleaner. Notched valve covers might be convenient.

Some would consider being forced to use a different air cleaner than what they have and notching their vc's to be mods that must be done to make the swap work.

Yes exactly no major mods needed I was just saying its a Lil more work compared to a sbo.

I'm saying it's ZERO additional work compared to a SBO. If the car is prepped for an Oldsmobile V8, it doesn't matter if it's a 260 or a 455 when you drop it in.

Really? Were you able to re-use your stock sbo fuel line to the carb? What about the AC compressor brackets? Was that a direct fit too? Did you reuse all your sbo belts? Mod carb to work right with the bigger engine?

So what you're really saying is that there are more than 'ZERO' things one must take into account when doing the swap right? Sure, they may not be big things to worry about and some may not even apply, but they are things that people should be made aware of and saying 'ZERO' additional work is a flat out blanket statement that could cause some major headaches for those who weren't prepared to deal with them.

If you're talking about pulling out a 307 and the choice is 403 or 455, then you're right, the 403 is easier, it's complete bolt-in. I was coming from the angle that, if you're going to do a major engine swap, in my case Buick V6 to Olds V8, there's zero additional work to doing a BBO over a SBO. There's TONS of work to be done, of course, and there ARE differences between SBO and BBO, but there's no ADDITIONAL work based on the choice of motor, just DIFFERENT work. Unless again you're starting with a SBO, which in this case he is, and so I stand corrected. As far as the car is concerned, it doesn't care if you put in a 260 or a 455, they fit equally well. I'm sorry for not being clear.

 

[iameggor]

I put an Olds 455 bored .30 over in my 84 hurst/olds I love it🙂 I still have a/c, didn't have to modify the box. It was a tight fit but i think the hardest part was putting hooker engine swap headers on... i had to dent about ever tube to clear.. and now my turning radius sucks. But all in all was fun to do and some people hate that i did that to a hurst/olds but its not there car. I would get a good radiator, and i had to modify my hood for a taller intake that came on the engine. And beefed up the transmission.

 

[L92 OLDS]

Beautiful car and nice job on your 455 swap iemeggor. What internals did you go with and what mods? What kind of power are you making?

 

[iameggor]

Beautiful car and nice job on your 455 swap iemeggor. What internals did you go with and what mods? What kind of power are you making?

To be honest I bought the motor used, it was pretty fresh though... i have a list somewhere of the parts inside it. Was told it is suppose to be 9.5:1 motor. The stuff i did to it, the intake is a torker 2, aluminum radiator, electric fans, holley 750 double pumper with the choke horn removed, hooker engine swap headers 1 7/8 tubes. pypes 3in stainless exhaust, Flowmaster super 50s, yukon posi, poly bushings all around, boxed off all rear control arms, Belltech lowering springs and shocks, and other odds and ends. I have never had it on a dyno but would love too, but can only guess what the horse power is. It is a fun ride though considering was built on a budget🙂