Camshaft dillema

Hello

At the beging want to say that my questions are "location" and lack of knowledge/experience driven so be patient please.

Here is the thing:
I have 471 motor in my Duster.
Few weeks ago it turned out that one lobe on my cam ate a hole thru one of the lifters, so cam and lifters are junk.
I ordered a new cam and lifters set, I had Comp Cams 21-225-4 cam in it and ordered the same thing.
My supplier made a mistake and sent me 21-224-4 cam set.
Here are links to specs of both cams:
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=709&sb=2
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=708&sb=2

Does it make sense to keep the wrong cam and put 1.6 rockers on it to have similar lift and also advancing it 4 degrees to make it work with my stall converter or should I send it back and wait another 2 to 3 weeks for the correct cam?
I have the 1.6 rockers set that I can bolt on and go, with replacing cams problem is that I need to wait 4 weeks... Welcome to Poland.

Any advice?

Cam I had .507 / .510 lift with 1.5 rockers.
The wrong cam I got would have .520 / .524 with 1.6 rockers.
I have the room for extra lift.

Duration of the wrong cam is big difference:
274 intake 286 exhaust vs 284 intake 296 exhaust on my previous cam.
Duration @ .050" Lift in old cam 240 in 246 ex
Duration @ .050" Lift in new cam 230 in 236 ex

if I add 4 degrees (i can advance 4 or retard 4 with my timing set) will it be a sensible compromise?
I have 3000 stall converter and as is the cam they sent seems to be a wrong idea.

Any advice?