need help with my 340

i recently just picked up a 69 340 and 727 from a friend. the motor has about 30k on the rebuild and trans is getting rebuilt next month. the motor has stock crank, 10.5 to 1 comp pistons, mopar 509 cam, 2.02/1.60 heads with 3 angle valve job, and an offy dual plane intake. im really looking to get more out of this motor without spending 5 grand, i dont really want to go the stroker route, and i want to run the cast heads for now, can anyone throw me some advice on more performance out of this old thing? open to any opinions, different cam, intake, anything?? whatever you think i should do please throw me ideas