301.370. 1. Nothing in sections 301.010 to 301.440 shall beconstrued to prohibit the owner of a duly registered motorvehicle from removing the motor or engine from such vehicle andreplacing it with a new or reconditioned motor or engine of thesame make or manufacture.
2. The owner and the person removing and replacing suchmotor or engine shall join in an affidavit showing the number ofthe motor or engine removed, the date of removal, the reason forremoval, and a description of the motor or engine replaced in thevehicle.
3. If the motor to be installed is a reconditioned motor, itshall bear the same number as the motor removed but shall bepreceded by the symbol "RC". If the motor installed is a newmotor, it shall bear a special number to be secured as providedin section 301.380.
4. The affidavit, together with the original certificate oftitle, shall be sent to the director of revenue at JeffersonCity, Missouri, with a fee of one dollar for registering suchchange of motor or engine. The director of revenue shall filethe affidavit and certificate in his office and shall issue anddeliver a new certificate of title to the owner.
5. The owner of a motor vehicle that is identified on theappropriate Missouri certificate of ownership by a manufacturer'snumber other than the engine or motor number shall be exempt fromthe provisions of subsections 2, 3 and 4.
6. The director of revenue may adopt and enforce the rulesand regulations, compatible with this chapter, that he deemsnecessary to properly administer this section.
(RSMo 1939 ยง 8397, A.L. 1945 p. 1194, A. 1949 S.B. 1110, A.L. 1961 p. 486)(1961) Fact that plaintiff in action on insurance policy to recover for loss of truck by fire had switched engines in two of his trucks, covered by same policy, without complying with provisions of this section and obtaining new title certificate, did not affect his insurable interest in the truck, though policy, issued after the transfer, described the truck by the original motor number. Melugin v. Imperial Casualty & Ind. Co. of Omaha, Neb. (A.) 344 S.W.2d 144.