Will a 5.3L engine bolt up to a 700R4 transmission?

Yes, a 5.3L engine can be bolted to a 700R4 transmission, but it typically requires an adapter or specific bellhousing designed for that combination, as the 5.3L is an LS engine and the 700R4 is an older transmission. Additionally, modifications may be necessary to ensure proper alignment and compatibility with the engine's electronics and fuel delivery systems. Always check compatibility and consider any additional components needed for a successful installation.