i just pick up a 350 in a old milk truck but i dont no what year the serial # 3970010 2 and also could it be a 4bolt it s to put in a 71 gmc
mortec is a good site, since its a 010 block its a high nickle,good builder block. If it came out of a truck originally its more than likely a 4 bolt main. but the best way to tell is just to crack the oil pan open and see for yourself! good luck!
thank you guy s for the info i start taking apart and it is a 4 blot so i think it s going to be a nice projet and a good motor for my 71
