340 question

Sure it is. You can locate a steel crank and replace the pistons but at that point you might want to look at a rotating assem. Make it more gooder! 4" stroke .30 over and you have a 416. Like my 68 Barracuda.
I like more gooder. There is nothing around me and most the stuff I see is high + shipping , even short blocks are$$$$$$$$$$$.