Hi, may not be of much help, but my early bay came with a type4 in it, there is vid below.
https://www.youtube.com/watch?v=PXGnUPo4Iuk" onclick="window.open(this.href);return false;
It had been crudely fitted in, areas around the engine and the valance butchered to fit it in, so tin didn't fit and i imagine it would of ran hot. Plus original engine mounts removed and type 4 bar brackets welded in. Wasn't for me, mines all back to stock now with new panel work/valance engine etcetc.
Cheers,
Simon.