Hello there,
Thanks for the responses I got last time I posted on this site, it was very helpful.

I've got to a stage of the project where things can be rebuilt instead of tore down. I've come into a a few questions though.

1. When replacing old bolts, is Grade 5 ever acceptable or should Grade 8 always be used? A side note, if anyone knows where I can buy Grade 8 Imperial hardware in the UK, please let me know!

2. The nut that holds the front wheel hub onto the steering knuckle shaft, it's a 3/4" fine thread castle nut... the only replacements I can find, I do not know the tensile strength of, I would've thought this nut is quite important structurally?

3. The rear wheel studs, are they the same as the front? I bought a load and the front and rear are identical, however the rear ones do not fit, the swaged shaft is too wide and too long. I do not know whether my rear end is original (code 9783393), and it appears that either the left or right axle shaft has been replaced independent of the other as the designs are slightly different (access holes in the rotor and length of the bearing swage). If the rear studs are indeed supposed to be different from the front, I do not know where to buy them from?

4. Mounting the subframe to the body... the mount holes have rusted a bit, and I do have those big "repair" washers to sit directly on the subframe, but there is a little bit of play when the rubber bushings are installed... would this be noticeable/dangerous when the car is in use? Should I weld the washers in place on the subframe to stop the bushing movement?

5. Not ready to mount the engine just yet but... I have a 326 and could not find replacement engine mounts, but have read somewhere that the mounts for the 400 are the same?

I realise that is a lot... perhaps it would've been better to to do each question separately...

Thanks so much for reading,
Lloyd