Hello I have a 79 firebird with a 383 stroker

I need help converting over to TBI..
I have. A few questions...
my specks.
383 Stroker scat assy.
Howards cam 110051-10
procomp alum. heads 210cc runners 64cc chambers
12cc dish Pistons.
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parts I have

5.7 Tbi.
Wire harness 95 4x4 suburban
95 Ecu suburban with 4l60e trans prom
4l60e trans
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how large can I bore out the tbi? 46mm?
What inline fuel pump should I get on a budget?

Thanks in advance