| What's the year of your 748?
The 916 has 10mm engine bolts and later 996s and 748s (post 98 I think) have 12mm Engine bolts.
Check your bolt sizes.
All pretty straightforward after that - fuelling remap etc.
If necessary You could bore out the mounting holes on the 916 engine to 12mm.
Or you could just use the 916 barrels pistons and heads to make an 853 | 
Hybrid Mode
