Induction

[MGB567]

I'm installing a "worked" 500 (ex Chimaera) into my '79MGBGT. I bought it without any induction but I have a manifold and plenum base from a 4.6 LR. So my questions are:

do I need a gasket between the manifold and plenum like the one ACTProducts sells? (I can't find one on Rimmers or tvr-parts and there wasn't one with my manifold and plenum but I think I bought those as two parts.)

at present being ex LR the manifold is 38mm bore as are the trumpets. I assume I should machine it to 44mm and buy corresponding diameter trumpets?

what is the height of the Chimaera trumpet and are they all the same height in the plenum or are they two heights like on the LR?

(The induction won't fit under my bonnet in LR configuration so I have to delete height where I can).

[MGB567]

Thanks. I've found out that LR use a silicone bead rather than a gasket between the manifold and plenum base rather than a gasket so it looks like the TVR500 used a gasket. I have the facilities to machine the plenum base and port/polish the manifold and trumpet holes but I'm still seeking confirmation on the height of the trumpets.

I'd also like to know if the 44mm trumpets (or were they 45) in the 500 were flared or straight and what was the clearance between the top of the trumpet and the underside of the plenum.

I'm aware of V8developments/V8tuner etc.