what model engine is it ??? if 5.5 you may as well use the air nipple to feed your pump for other models 7.5 10hp …… I think the pump on a plate is the best way to go
presently working on a 10hp myself
you can also do a B &S pump on a frame attached to the back cross-bar if your engine has one… but you will need a vacum pulse either from the air pressure nipple or a drilled cover plate with the air pressure nipple block out with a piece of short fule line anda short bolts tuck in it
https://www.youtube.com/watch?v=ojOMbwvH55I
https://www.youtube.com/watch?v=FtG4M7ye1N8
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