Through experience the Victa's version of the Briggs engine has a shorter shaft than a Rover,Masport etc.So you will need a Victa base.Trust me I've been trying this out myself and it hasn't been working.If you want a base that is going to last then use a Victa alloy base.If your going to use the same blade disc and blades you will be looking for a 19 inch cut base.Perhaps something like a Razor base.
Something like this.Maybe.
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Here for a good time,not a long time.