Beaufighter exterior door and engine musings

[TonyK]

Hi I’m very new to this forum having just acquired a 1981 Beaufighter that hasn’t had the easiest of times. The previous owner has sorted out the chassis and brakes and, then painted it gold for a TV series. All this leavers me with a lot to do.
Can anyone please confirm if the exterior door handles are the same aa Fiat X19 Lancia Stratos ? Look very similar.
Also does anyone have any experience or advice for fitting a Chevy LS engine especially around the engine mounts? I understand the factory performed a number of upgrades using this unit.
Tony