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Its all obscure items really but its my understanding that even a like for like replacement engine would loose a point as the original is suitable for reconditioning in the main unless it is completely none salvageable, similarly all of the the other points outside of consumable parts are the same situation expect brakes which understandably are not to be encouraged down reconditioning route repeatedly.
Evidently in the case of a reconstructed classic taking in parts from donor cars of the same type this would fall within the scope of a Q plate car however of course in real terms who could possibly tell and really common sense prevails in that regard i would say.
In my cars case the subframe being modified has a significant effect upon the identity system as it counts as the front axle and suspension points given that it has a direct relationship with the wishbones and forms an axle assembly
In the case of the steering rack i fitted a 3.25 turn rack from an early 1850 onto solid mounts which is about a tenuous as these things get but is still something that can be discovered with a few seconds on google
the shell is definately outside the scope of the 5 points as lt77 gearboxs cannot be fitted without raising the tunnel above the propshaft as its really deep.
i guess maybe as the rear suspension is standard i do score a single point!
if i could fit a smaller gearbox i could get it above the 8 points but the subframe is abit of an issue really.
Right, having built a car with a different engine (Vauxhall 2.0) this is my take.
I have a completely unmodified shell (5 points and mandatory)
I have modified the front subframe and swapped in a Sprint rear axle (though the rear axle is debatable the subframe mods mean 0/2 points for axles as the subframe is the "front axle")
The engine has been replaced with a non standard item (0/1 points)
The gearbox has been replaced with a non standard item and the prop has been modified (0/2 transmission points)
All suspension is of the original type and design and fits to original mounting points (2 points)
Steering is of original type and design and fits to original mounting points (2 points)
NOTE, I have also used solid mounts but since they mimic the originals and fit to the same mounting points this is acceptable.
So I have a 9 point car and no BIVA is needed
A few other points, You ARE allowed to ADD things like additional engine mounts or strengthening to a chassis or monocoque WITHOUT penalty and CAN remove SOME bits like non structural unwanted engine mounts.
Cutting different holes or even making an entirely new gearbox tunnel is fine cos it's not part of the monocoque but a bolt in panel.
You may have modified the front subframe, but so long as you have not altered the suspension mount points, you will not lose suspension points for it, just the 2 axle points ( you wouldn't get 1 point for a stock rear axle anyway, it's 2 points for 2 stock "axles" or 0 if even 1 is not stock)
As others have said, a Dolomite rack is a Dolomite rack, the ratio is unimportant. They wouldn't check this anyway so long as it LOOKS as if it belongs. The same applies to uprated springs and shox, so long as they are direct replacements for factory stuff, it's OK.
The points scheme makes no mention of brakes, for or against, so brakes are more or less free to do as you want with.
As far as I can tell, your only problem lies in what has been done to the trans tunnel of the monocoque to clear the prop. Depending on how well this has been done, it MIGHT pass muster if checked.
But if you DO decide to take it for a BIVA, PLEASE post the results!!!!
I'm sure I'm not the only one who would be fascinated to find out what the powers make of a Dolomite. Whilst I suspect the exterior would be pretty much OK, with the possible exception of the shape of the bumpers and the relatively "sharp" rear edges on them, I rather fancy you would have to do some work on switchgear, seatbelts and other stuff inside to pass.
Steve