The Roof:
Having now removed the Britax sunroof, the extent of the repairs required can be seem.
On the plus side the roof is in good condition, but sadly the sunroof is not. The lining is worn out and ripped and the metal supports inside the roof are very rusty, I will try to dismantle it to decide which route to take.

 

The sunroof metal end panels were found to be really rusty both the inner lining and outer cover would need replacing. So I have made the decision to do away with the sunroof and fit a new complete roof panel. 

Here goes !    I have started to cut away the old roof panel, I will run a thin cutting blade down the gutters to release the sides and drill out the front and rear spot welds.

The remains of the roof were removed from the gutter rails with a grinder.

 I treated the rust with Jenolite and then Bonda Zinc Primer.

This was the first of several test fits, naturally even though the roof panel was a new Heritage part, it still had to be fettled to get it to fit. I placed Cleco fixings along the front and rear edges where the plug welds will be, the drip rails will be bonded. 

 Paint was applied to the roof rails and underside of the roof panel, and the edges treated with weld through primer.

The new MGB  roof is now in place, I used Bondtech 60 on the drip rails and plug welded the front and rear edges. I clamped it overnight until the bonding was fully cured.

 I then set about filling the pillar seams, which I had already tack welded. I decided not to used lead loading as the heat generated might damage the bonding on the drip rails, so I used Belzona metal compound, I will skim over the joins with filler later on to make an invisible join.

Fuel & Induction:

I made a decision early on, to go with a Holley 4 barrel carburettor, which also means a different inlet manifold.

There are several inlet manifold options, such as Offenhauser, Edelbrock, or a modified Rover manifold. 
The Edelbrock and Offenhauser are both quite expensive and the modified Rover manifolds difficult to obtain. However, I managed to get lucky on ebay and found a Rover manifold modified for the 4 barrel carburettor, once the red paint was cleaned off it looks good.

This is it cleaned and fitted, the only problem now is the carb sits a bit high and touches the bonnet.

I bought an overhaul kit from America for the carburettor and will do a complete strip down and rebuild.

The weather has continued to be bad in January 2014 and looks set to stay the same in February, so work is confined to mechanical stuff in the garage.

Started stripping the carburettor and found severe corrosion in the primary float chamber. The float was siezed and corrosion was everywhere.

 I Overhauled the carburettor, replaced the rusty primary float and assist spring, and replaced the accelerator pump and secondary diaphragms, all seals, both float needle valves, power valve and all the gaskets.

The float levels were then set to the correct height. The photo on the right is the primary float bowl after cleaning and new float etc.

 

This is my home made throttle cable bracket, using the stock MGB cable. I may need to increase the spring tension though.