First, the engine bay of an S10 Blazer is relatively small, so you will need to make sure that the 5.7-liter engine will fit. You may need to do some modifications to the engine mounts and other components in order to make it work.
Second, the 5.7-liter engine is much heavier than the original engine that came with the S10 Blazer. This will add weight to the front end of the vehicle, which could affect its handling and performance. You may need to install some additional suspension components or modifications in order to compensate for the increased weight.
Third, the 5.7-liter engine will require more fuel than the original engine. You may need to install a larger fuel tank or modify the fuel system in order to support the increased fuel consumption.
Fourth, you may need to make modifications to the exhaust system to ensure proper flow of exhaust gases.
Finally, you will need to make sure that the engine is properly connected to the transmission and other driveline components. This may involve some custom fabrication or modifications.
If you are willing to take on these challenges, then installing a 91 5.7 Chevy engine into an S10 Blazer is possible. However, it is important to do your research and make sure that you have the skills and resources necessary to complete the project successfully.
