The CPR is considered a non-repairable part. Some members have had success in repairing it but I don't think that there are any service parts available for it except as a complete assembly. Since it is a fuel system part most would not consider trying to repair but would just replace once sure it is defective. The connections were probably spot-welded but you could use solder. Silver solder would be better but I don't think needed. Once you get the CPR going you may find you have other problems causing poor acceleration, you may need a fuel mixture adjustment for instance. David Teitelbaum vin 10757