B 303 Cam

If you already bought the cam, and you're installing it no matter what we say, why are you asking these questions?

I misread your post, I apologize.

You really should reconsider using a B cam. Like others have stated, it's outdated, and there are better ones out there. I'm doing a similar engine combo, and plan on using the Anderson Ford Motorsport N-412 cam.

From the website...

N-412 Camshaft works with stock OEM pistons with 1.6 roller rockers. RPM range 2300-6200.

302 c.i.d. This cam is to be used with 1.6 R.R. Great with GT-40, TFS or Edelbrock heads. Minimum 24lb injectors and 75mm mass air. Recommend 3.55 to 4.10 gears. Great drivability down to 1800 rpm, nice idle, rpm range 2300-6200, works best with 89-93 EEC, needs 2500-2700 converter.Example of using N-412 camshaft
DSS 306",AFM N-412 camshaft, AFR 185 heads,70 mm T.B.,30# injectors,Holley Systemax, 76 mm C&L mass air meter ,Flotech shorty headers,off road h-pipe,flowmaster 2 chamber muffler, MSD 6al & blaster coil,1.6 rr,190l itp,,BBK cold air ind,

Specs found on this site doing a quick search...

N-412 Cam Spec

Engine 302HO/351

Duration at .006 -- Int. 276 Exh. 284
Duration at .050 -- Int. 222 Exh. 230
Timing events at .050 --Int. 3/39 Exh. 51/-1
Lobe lift @ cam -- Int. .320 Exh. .320

Gross Valve Lift w/1.6 Int. 0.512 Exh. 0.512

-Lobe Seperation 112
-Degree intake Lobe to 108
-Valve Lash (hot) Int. & Exh. 0

You can run the B cam without tuning. It's outdated and won't have the best street manners or produce the most power for the combo but will work fine. If you end up with a surging idle it's from another reason. That Anderson cam is a good one and so is comp cam 264-270hr either works great imo