need some info on a cam

[68GMC454]

ok,,i will have a late 70's 350 soon..i want to put a cam in it..now im not looking for a big horse power gain..just a smalll lope,,lol,,mainly the sound..
now i will be changing the push rods,,and other stuff to go with cam i think..im not that good of a mechanic,,just a shade tree...not good with technical names,,so bear with me..

what is a good reasonable cam,,now im on a real limited budget,,and it will take me another month or so to even get the parts truck paid for.(400)
so this need to be a real good price..also will be changing from timeing chain to gear drive,,i think thats what it is called...

any info is greatly appreciated,,even if i cant spell it..

billy