I have a 350 2 bolt main block # is 14093638 it came out of a truck or tahoe... The heads casting # is 14102193 I was told these heads are worthless now my question is should i put my 305 H.O heads on the 350 would that make a difference??

Another question is should i switch the cam in this engine i want to actually just put a lift duration exactly the same as the 305 H.O. engine i think i will get more with the 350 period wouldnt i?

I pulled the engine apart it seems fine but its really hard to turn the crank over w/o sparks plugs in it i have to use a crow bar and turn it with the flywheel. is that normal? i was told the engine with redone on the bottom end but i was told that it should still be able to turn pretty easily is this true im new to this stuff. These are my question and hopefully yall can help me on this.

 

I belive my 305 heads are 14014416. If i use these heads also i want to use this camshaft kit http://www.summitracing.com/parts/EDL-2102/ will the stock valve springs on the 305 heads handle this cam kit? Just gonna use my stock intake for awhile with the q jet.