Remembering why I
dislike working on
AO Silver Member
Join Date: Sep 2001
Given the level of fabrication etc you are looking at, then the plenum is the least of your worries I'd think - no big deal to replicate the 75 arrangement with inlet runners coming upwards and a central plenum, assuming you have the bonnet clearance. Failing that, as mentioned, swinging the plenum to the other bank is quite do-able as well.
FWIW, I'd avoid 12V motors and early 24V ones. Go for the latest 24V you can find, ideally a 3.2 if you can find one. The 166 is a good donor for a 3.0. GTA 147/156 for the 3.2 as there are more of them about.
Before everyone gets all irate about that, I built a couple of 12V motors a while back but parts are getting scarce and you can't argue with the results form the later 24V motors.
A stock 3.2 on a decent exhaust and aftermarket management will make 280bhp if memory serves.
Neat project by the way, but as mentioned, beware the weight of the Busso engine - it might be aluminium but light it aint. I really noticed the weight/CG difference in my Strat copy when I changed from a Lancia twin cam to a 12V V6.
(eta...really must change my avatar - sold that car last year)