Where can I find a Pontiac 403 CID engine?
Supposedly 403 solid main web blocks are found in the Pontiac Bonneville with the towing package, and in some 1979 Pontiac Trans Ams with a towing package. Then again, for all but 600HP race motors, it’s not necessary; the metallurgy of the 403’s is quite well done. [ Thanks to Chris Witt for this information. Siamesed Cylinders
Can a 403 CID engine be supercharged?
The 403 is a mediocre all out performance engine. The main bearing webs are the weak link and the engines can usually accept only a .040 overbore. They are thin. Yes you can bolt the mounts off the 350 right to the 403 and drop it in. As for supercharging you need to look to a different engine assembly.
What was the bore of the Oldsmobile 403?
As a result, it has a bore of 4.351 inches (110.5 mm), giving it one of the widest bores of any factory small-block V8. Oldsmobile discontinued the 403 after the 1979 model year.
Can You supercharg a 350 to a 403?
Yes you can bolt the mounts off the 350 right to the 403 and drop it in. As for supercharging you need to look to a different engine assembly. A 350 or 455 is a much better choice. Danny Lattimore has a stock class 403 in a Trans Am that turns 7500 RPM.
Supposedly 403 solid main web blocks are found in the Pontiac Bonneville with the towing package, and in some 1979 Pontiac Trans Ams with a towing package. Then again, for all but 600HP race motors, it’s not necessary; the metallurgy of the 403’s is quite well done. [ Thanks to Chris Witt for this information. Siamesed Cylinders
The 403 is a mediocre all out performance engine. The main bearing webs are the weak link and the engines can usually accept only a .040 overbore. They are thin. Yes you can bolt the mounts off the 350 right to the 403 and drop it in. As for supercharging you need to look to a different engine assembly.
As a result, it has a bore of 4.351 inches (110.5 mm), giving it one of the widest bores of any factory small-block V8. Oldsmobile discontinued the 403 after the 1979 model year.
Can You bolt a 350 engine to a 403?
Yes you can bolt the mounts off the 350 right to the 403 and drop it in. As for supercharging you need to look to a different engine assembly. A 350 or 455 is a much better choice.