I recently purchased this carb, 7041540 MF 1161...numbers say its 71 800cfm 455 for automatics. My intent was for a 455 I am building at a snails pace... I was thinking of putting on my mildly built 72 350 motor with TA Stage 1 aluminium intake in the interim and get rid of the Holley. A) Do I have the correct gasket? It looks like there is a channel towards to front and see other gaskets that have this channel... although the last pic says its for a 65-69 qjet and doesn't look like the correct size for the channel anyway. B) my car is a 4 speed. Is there anything special I need to do? I know there are specific 4 speed carbs... don't care about looks just functionality, just need to know what to do to make it work to the best if it's ability. Thanks for any help.