403 Oldsmobile

HP HUNTER · 01-18-2020, 08:29 PM

Has the 403 Oldsmobile ever been sucessful in stock? Reliable? I know the main saddles are windowed.

Bob Shaw · 01-18-2020, 08:41 PM

Al Provoast used to run a 403 Olds. Many times top qualifier. Some of the 403s are not windowed but I don't know which ones. Bob Dennis knows.

Bench Racer · 01-18-2020, 09:53 PM

Back in the early 80's a guy ( I can't remember his name, I'm sure Mark Lewis can chime in) from around Winston Salem, NC ran a Delta 88 with a 403. It might have ran in Pure Stock but I remember it was pretty stout and he was a hitter for several years. I know Bob Dennis ran a 403 in Super stock a few years ago. I think Rock or Zack Running got Bob's car. It runs the big Q-jet, got a .440 lift cam and had a 2.0 intake and a 1.5 exhaust valve.

The Hawk · 01-18-2020, 10:06 PM

I believe Bill Kost ran one as well with good success.

SSDiv6 · 01-18-2020, 10:38 PM

Pete Kost drives Bill's former Oldsmobile and it is still powered by a 403.
It is one of the most successful 403 powered Oldsmobile's in Stock eliminator wining many races and setting many records

All 403 blocks are windowed; there were no solid web 403 Oldsmobile blocks.

GTX JOHN · 01-19-2020, 01:10 AM

Bill Kost (RIP) spanked our 360 Aspen Wagon
more than once in class. I think it was I/SA or K/SA
back then about 15 years ago.

rallye bob · 01-23-2020, 06:10 PM

Quote:

Originally Posted by SSDiv6

All 403 blocks are windowed; there were no solid web 403 Oldsmobile blocks.

This is fact...

Years ago a gentleman offered a million dollars if you could come up with a solid main web (SMW) factory Oldsmobile 403 block....

Dave Noll · 01-24-2020, 01:53 AM

Quote:

Originally Posted by rallye bob

This is fact...

Years ago a gentleman offered a million dollars if you could come up with a solid main web (SMW) factory Oldsmobile 403 block....

And?

Bob Shaw · 02-16-2020, 05:57 PM

Quote:

Originally Posted by SSDiv6

Pete Kost drives Bill's former Oldsmobile and it is still powered by a 403.
It is one of the most successful 403 powered Oldsmobile's in Stock eliminator wining many races and setting many records

All 403 blocks are windowed; there were no solid web 403 Oldsmobile blocks.

According to the late Joe Mondello there were about 2500 solid main web 403 engines built. Most of them were in 1977 Buick station wagons. Block casting number is 557265-4A or 554990-4A. My son has one in his Cutlass.

SSDiv6 · 02-17-2020, 11:00 AM

Quote:

Originally Posted by Bob Shaw

According to the late Joe Mondello there were about 2500 solid main web 403 engines built. Most of them were in 1977 Buick station wagons. Block casting number is 557265-4A or 554990-4A. My son has one in his Cutlass.

Bob,
I have built engines with both casting numbers and the mains are hollow. Has your son torn apart his engine and looked at the block?

01-18-2020, 08:29 PM	#1
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 606 Likes: 68 Liked 238 Times in 97 Posts	403 Oldsmobile Has the 403 Oldsmobile ever been sucessful in stock? Reliable? I know the main saddles are windowed.

01-18-2020, 08:41 PM	#2
Bob Shaw Member Join Date: Jan 2002 Location: Sedalia, Mo Posts: 427 Likes: 280 Liked 290 Times in 58 Posts	Re: 403 Oldsmobile Al Provoast used to run a 403 Olds. Many times top qualifier. Some of the 403s are not windowed but I don't know which ones. Bob Dennis knows. __________________ Bob Shaw V/SA 515

01-18-2020, 09:53 PM	#3
Bench Racer Member Join Date: May 2002 Location: Green Creek (Tryon) North Carolina Posts: 330 Likes: 69 Liked 99 Times in 21 Posts	Re: 403 Oldsmobile Back in the early 80's a guy ( I can't remember his name, I'm sure Mark Lewis can chime in) from around Winston Salem, NC ran a Delta 88 with a 403. It might have ran in Pure Stock but I remember it was pretty stout and he was a hitter for several years. I know Bob Dennis ran a 403 in Super stock a few years ago. I think Rock or Zack Running got Bob's car. It runs the big Q-jet, got a .440 lift cam and had a 2.0 intake and a 1.5 exhaust valve.

01-18-2020, 10:06 PM	#4
The Hawk VIP Member Join Date: Mar 2003 Location: Littleton,Colorado Posts: 1,185 Likes: 0 Liked 235 Times in 102 Posts	Re: 403 Oldsmobile I believe Bill Kost ran one as well with good success. __________________ Lane Weber It`s Not What You Drive That Wins....It`s How You Drive It

01-18-2020, 10:38 PM	#5
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,991 Likes: 693 Liked 1,457 Times in 543 Posts	Re: 403 Oldsmobile Pete Kost drives Bill's former Oldsmobile and it is still powered by a 403. It is one of the most successful 403 powered Oldsmobile's in Stock eliminator wining many races and setting many records All 403 blocks are windowed; there were no solid web 403 Oldsmobile blocks.

01-19-2020, 01:10 AM	#6
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,530 Likes: 2,222 Liked 1,809 Times in 572 Posts	Re: 403 Oldsmobile Bill Kost (RIP) spanked our 360 Aspen Wagon more than once in class. I think it was I/SA or K/SA back then about 15 years ago. __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 01-20-2020 at 02:51 AM.