1) Removed jammed fuel shutoff valve and extension handle.
2) Removed hand operated "squeeze bulb" backup fuel pump (deteriorated original equipment; inaccessible to pilot).
3) Removed glass fuel filter (Builder Tip; know catastrophic failures).
4) Removed expired rubber fuel hoses.
5) Cleaned and reinstalled cabin heat selector valve (black box at lower left of firewall in picture #1; cable attachment interferes with firewall wiring harness bulkhead; solution needed).