'70_Duster_340
Well-Known Member
The Holley Street Avenger 670 needs just about a full inch for the linkage to work on the stock iron mainfold... Will this help or hurt performance ??
Thanks
Thanks
It is difficult to know for sure until you try but usually spacers help with power. One thing is for sure since the carb won't fit without the spacer it is 100% gain in power over not running at all.
Chuck