years ago had a Cavalier diesel for my sins, stolen and written off 3 times, bought it back every time car ended up at minus £600 and did 40K miles after cheap motoring
have used an air chamber inside farm building to store racing Aston. Way better than just in building, used to find after a couple of months that alloy engine would be covered in white corrosion, none at all with air chamber. just my experience
just don't understand why anyone would go to all the trouble of V8 conversion then use a 3.5 Rover that will probably have less power/torque than a reasonable L series
i used the Arizona Z as pictured no problems.I have since moved the inner pick-up point out and up tp cure the issue! My car i very low as it is just a race car. Hope this helps