302 build need advice

im deep in confusion.bought a motor from a guy says it was a 87 302 h.o. its indeed 87 302 h.o by the piston numbers. the guy also said it had a b303 cam in it. me and my dad are rebuilding the motor i pulled the lifters off marked them so on so on. pulled the cam out and before the last elbow it has 8Z then on the very end it has b|r then c another c another c b10. going all around the camshaft end. where if it was b303 wouldnt it state b303?
i dont have a dial indicator to measure it until i can go back to my work.

my car is a 93 lx 5.0 t5 going with 373 or 410 gears.1.6 svo roller rockers going to be street car and sometimes strip. im converting to carb. running gt40p heads ford racing headers, edelbrock airgap intake, msd6a box,trickflow upgraded springs for heads.650 holley double pumper carb holley blue fuel pump with adjustable reg

my question is should i just not worry with the cam and get a different one? i got $300 to spend and dont want to spend no more than $200 on a cam. any idea's for my build?i want to take car to atleast 6000rpm

thats kind of what ive been thinking.. been eye balling the summit site all day looking at the tfs 1 cam. $180 now looks like it went up since my friend bought one awile back. will i be able to use my old lifters if i put them back in the right spot? and how well would that cam do with the air gap intake and the rpm ranges of the intake and cam. also what would be better for it the 373 or 410 gears?