basically im driving a 1981 toyota corona(TT-132).. i have been told tht cars tht were produced before 1985 are non-galvanized metal.. so the metal will degrade dractically over time and become soft... is this true? and will it be worth it to maintain and mod my car? i've spent about 10k so far restoring it cuz it was a mess when i got it.. i want an engine transplant but im not sure wht to get.. AE101 and AE111 is front wheel drive.. mine is a rear wheel drive... and my surrent 3T engine is...