first... does anyone know the HP Torque for a 1983 350 and 305, or even better the HP and Torque for a Jasper refirbed 350 and 305? Listen to my horrible story, i know i will sound like an idiot but i still want to share. We bought my K5 from a man who told us it had a 350. we trusted him so we didnt question him. the 350 drops a valve into the cylinder. as you can imagine the piston was cracked and the cylinder walls screwed. so we ordered a Jasper refirbed 350. it came in the mail and the shop putting it in informed us that our orignal engine wasnt a 350, but a 305. i was pissed, but couldnt afford all the extra goodies when swapping from a 305 to a 350, such as a new carb. i am tight on money right now. so we sent the 350 back and ordered a Jasper 305. this has been a horrible week i wanted my 350 so bad.