These round hood bumpers were used on the 250 Scaglietti-built. These truncated cone shpaed hood bumpers were used on the 250 series cars with Scaglietti built bodies. The bottoms of the bumpers are cut so that there is a 1/16″ “press fit” between the bumper and the hood or the trunk when they are closed. These were attached using a trim washer and a slotted flat head sheet metal screw. The P.F. cars used a different piece. Scaglietti Hood Bumpers.
The early outside plug 250 series engines used a small carbon brush assembly to activate the cooling fan clutch. This is a pencil-sized plastic assembly, held in place by a spring clip, with a small spring-loaded carbon brush that sends an electrical signal to activate a magnetic clutch to engage the radiator cooling fan. The design was improved on the later 250 cars with the addition of a second ground brush. The earlier assembly is shown on page 285 of Dick Merritt’s book Ferrari:Operating, Maintenance, and Service Handbooks 1948-1963. The later configuration, with the ground brush, is shown on page 170 of the “Carbooks” 275 Manual reprint. “Hot” Brush assembly with the retaining clip
For the long distance races or others when there would be a chance for rain Ferrari would use rubber boots to cover the distributors to keep the rain water out of the electrics. There are good photos of the T.R.s using these boots at Le Mans. Large Distributor Boots for the T.R.s