i got mine for 650. It has 55,000, and its a 97 and 10 months. That makes it the 9:1 compression model. 97 and 3 months and earlyer had 8.6:1 compression. 96 and earlier just had gt40 heads, where as the 97+ engines have the better gt40P heads, which is stamped on them. also the plugs come straight out at almost a 90' angle instead of tilted up like ours. CAN anyone help me decide between a trick flow stange one cam, and the crane 2031? please, please? ive got to order one so i can get this show on teh road