Not sure what Isky cam you ordered through Summit but the Isky 264 Mega cam-214-214 dur. at .050 .450 lift on a 108 LSA would work fine in your application. I ran this cam in my 1976 L82 Vette and had a lot more low and mid range than the L82 cam on a 114 LSA. If you want more rump rump sound look at the old Crane 274H06 cam-218-218 at .050, .450 lift, on a 106 LSA. This is an old low lift circle track cam that will give you the hot rod sound but yet be very streetable. I am running this cam in my 84 Vette converted from TBI to carb-ZZ4 intake with 600 Edel. carb, Accel HEI ignition, stock factory tube headers with true duals and no cats, 700R4 trans, 3.07 rear. I used the stock valve springs that have 68K on them and I can wind up to 5000 with no valve float at all. The Howards 290 cam would be pretty doggy in my opinion in the low and mid range and come on strong at higher rpm's ith its 114 LSA. The Isky 264 cam would have a nice performance idle to it and the 274 cam would have a more radical idle to it. You can order the Isky cam direct from them and they should have it in stock. You can still get the Crane 274H06 cam form Summit($200 with lifters) or Elgin makes a copy of it under part number E1785PM for around $100 from competitionproducts.com. Summit has this cam under their street/strip brand but I do not know the part number. These cams are good old school cams with fairly lazy lobe profiles that are easy on your valve train and work with an all stock valve train.