The bellhousing is a no go!!
I was misled but it removable and it looks like an adapter from bellhousing to box is possible instead of a complete new bellhousing.
The engine is the famous 807 series pressure die cast that weighs 18pounds bare block (just follow my links).
Its found in renault 16,17, 18 and fuego and 20s. Also in the rallye champion alpine a110 and various others such as specials like r8 gordinis and r12 gordinis.
This engine is no slouch either.
its hemi type head can take 44mm inlet valves and be taken up to 1980ccs.
In Holland one is producing 238hp at the flywheel and most race versions hit over 200 hp both in europe and in australia through colliers engineering in nsw.
Heres a site in french and english for the aftermarket parts available.
160hp can be reached without a sweat with the standard 1647cc 841 type engine and bruce colliers can get 167hp at the wheels in most customers cars with that capacity.
Pentroof design is very limited compared to this hemi crossflow stroke of genius.
http://www.mecaparts.com/Moteurs/R12page1.php3#okstandard bore is 79mm and can go up to 87 with the special kit.