1.are all world products small block heads the same? i have a 305 and there is a set for sale in the local papper. world products S/R torquer heads, it says they are for a chevy small block. whell chevy small block doesnt really narrow it down. he wants 375 for the set.
2. is my engine a roller 305? how do you tell without removing the valve covers, my car is a 1989 LO3 rs

 

first off the there are 2 kinds of s/r torquers one set is for 305 engines, they have 1.94 / 1.5 valves, 58cc chambers and 170cc runners, the others have 67 and 76 cc chambers and 170cc runners. they are both about $760 per pair new. Your engine, and all 87+ engines are hydraulic roller cams, 375 sounds like a good price, plus you can still use your stock intake, otherwise i would reccommend vortec heads as they can be had for about the same price used or around $525 new but the intake must be swapped out.