Mick
The standard GT spec crossflow manifold won't fit, the headers can be kept but you will need to modify the bottom part to fit through the hole in the inner wing.
In theory you will loose perhaps loose 10-15 bhp if you use a standard cast manifold.
I have a couple of spare 4/4 tubular manfolds, one steel and one stainless, PM me your details and I'll sort out some photos.
The carb should be a 32/36 DGV with a manual choke. With a bit of careful setting up, a decent cam and head work, good for about 120 bhp, ultimate would be a set of 40 DCOE or 40 DHLA but i) you really need a lot of head work to reap the benefits and ii) a lot of work getting them to fit especially to the bonnets!
Check the carb spindle very carefully, if its really worn, consider a new carb rather than a rebuild as they may be cheaper!
Just check your bellhousing very carefully, I could be wrong but I'm not aware of a Type 9 bellhousing using a hydraulic slave cylinder unless its an aftermarket one. I use an alloy copy of the standard Sierra bellhousing but with a concentric slave cylinder arrangement. Result is a very light pedal.
You will need to change the front UJ joint on the propshaft to mate with the Type 9 output shaft. My local propshaft specialist did this for 65 quid.
Hope this helps
Arwyn