Pretty self explanatory. What would that do? Wanted to add with the stock heads too. Would I need new springs? Wanted to save money here so. . .
Also, if I got a SBC 350 block around the same year, would all my 305 parts fit on the 350?

 

hey i put that cam info into dyno 2000 engine simulation, and it doesnt look to good, on a 85 305 stock heads, valves,exhaust etc. it was pretty low numbers, here`s what it got:

btw these are flywheel numbers

RPM HP TQ
2000 113 298
2500 143 300
3000 173 303
3500 194 291
4000 204 268
4500 194 226
5000 170 179
5500 139 173
6000 94 86

 

As to "what would it do" on stock heads:
Hit the rocker slot on the stud (unless elongated slot rockers installed).
Bind the valve spring coils.
Eventually, pull the rocker studs out.

That's entirely too much lift on a stock head.

Most everything from the 305 would fit the 350 assuming:
You get a 350 with the same type (roller or flat-tappet) cam.
You get the same type rear-main seal as you currently have.
You aren't talking about the heads (they would bolt up, but "fit" loosely intrepreted they would not).

If your current engine is "around" a 1986, you'll have problems with either an '85 or '87 350. But, only to the extent mentioned in the previous paragraph.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).