Jacoby transfers apply, so bid 3
to show you have 5+ spades. Since
you have interest in slam, bid 4
in response to show your shape (if
thats what it means ) and you should simply place the contract in some
small slam unless the bidding indicates your partner has a "very good" hand
or a "very bad" hand if you play something like step responses. (The hand
shown is about 6 1/2 losers, so you're a favorite to make some slam, and
there is a tiny chance of a grand slam in diamonds or spades. One bad
feature is the lack of honors and good intermediates in the long suits even
though there is almost a certainty of at least an eight-card fit. )
This method of showing balanced 22-23 hands makes some sense because
balanced 24+ hands can still use the machinery of Stayman, Jacoby, etc. if
playing something like 2/1.