CREATE TABLE table_68670 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

Name the engine when points are 0 and chassis is kuzma indy roadster for 1954
SELECT "Engine" FROM table_68670 WHERE "Points" = '0' AND "Chassis" = 'kuzma indy roadster' AND "Year" = '1954'
SELECT "Engine" FROM "table_68670" WHERE "Chassis" = 'kuzma indy roadster' AND "Points" = '0' AND "Year" = '1954'