The factory Fram CA305 is 3 1/8 inch high , your filter looks to be 1/2 inch or more taller than that. Plus your 383 base sits 1/2 inch higher than the 440. Not much, but that inch may help. Also how thick is you carb base gasket...The thinner, the more gain.
The factory Fram CA305 is 3 1/8 inch high , your filter looks to be 1/2 inch or more taller than that.
