So run a current through the solenoid and see if it throws, if so, just reseal it and go from there! Solenoids are expensive these days too!
Many folk here will tell you that full polybushing is too much and I agree with them! I settle for poly in the rear of the rear lower trailing arms, the axle end of the upper rear arms, the subframe end of the front tie bars, the rack mounts (add at least 1 solid rack mount, Shaun Roche of this forum does a very nice single L/H solid mount/ polybush for o/s kit) and the lower steering column bush. Use Superflex bushes, as supplied by Chris Witor, they are not the cheapest, but they ARE the best and Chris gives a discount on them to TDC members. You CAN put poly in the front subframe mounts for a more rigid feel to the car, at the cost of potential extra noise/vibration. Suspension wise, the 1" lowered and stiffer springs from Rimmers are a good bet, matched with Gaz shox with adjustable spring platforms for total control of ride height/geometry and stiiffness. And that's enough for a fast road car. And very similar to what I am running on my road/track Vauxhall powered Toledo - it works for me!
One thing you've NOT mentioned is brakes! Stock Dolomite brakes are barely adequate for a road car, if you want to give it some beans on a regular basis, go for the famous Trackerjack conversion, you won't regret it!
I don't have a spare 1850 front pulley myself, but I;m sure an ad in the wanted section will find you one in short order.
1850 and Sprint front subframes differ only in the extra engine mount brackets fitted to the Sprint derivatives. Which means you can cut the mounts off a Sprint frame and it will be an 1850 one. Going the other way is much more difficult and probably not worth the bother of trying, as Sprint frames are still fairly plentiful 2nd hand. I should have the 1850 frame here by the time you come over in October!
2 door '73 Toledo with Vauxhall Carlton 2.0 8v engine OWF 797M (The Carledo)
'78 Sprint Auto with Vauxhall Omega 2.2 16v engine EGP 247T (The Dolomega)
'91 Cavalier 2ltr 8v auto
'95 Cavalier 2ltr 16v auto
Spectrum Auto Services, Servicing, Repairs, MOT prep. Apprentice served Triumph Specialist for 45 years and home of Maverick Triumph.PM for more info or quotes.