question is a Holden 6 related to a american chev or ford 6?
any motor that was available was used 4 cylinder drone, volks and inline 4's to 6's to all v8's I don't remember the classes A,B,C,D, AND X DRAGSTER the break down weight to cubic inch you tried to build the lightest car possible. in England the had a lot of 4 and 6 cylinder dragsters