I have been playing with cars for awhile but am new to the "numbers game". So have a few questions. First when an engine is said to be SF code what does this mean? Second I have a 350 and on the back lower portion of the block it is stamped 350 with a 2 stamped under that. What is the 2 for, 2 barrel? Am searching for a motor for my project and don't want to get screwed like I did on the ragtop. Any suggestions on what year 455 I should search for? Thanks John
Hi John - An 'SF' coded engine is a 'big-car' 1970 455 motor rated at 370 hp/510tq. The 350 should have a two digit motor code on the block, between the #5 and #7 cylinders. That code should designate the specifications. A 455 drop in motor? A core to build? What are your intentions?
Marco Looking for a 455 core to rebuild, primarily street use. I have the knowledge and ability to work on rebuild them. What I don't know is what to change as far as cam, heads etc. Should this be a different thread? Has it been discussed before? Thanks John
70 stage one iron heads are the best with some talk of 67 big port 430 heads having a better rocker ratio. The 75-6 blocks are thought of as the best blocks for lack of core shift, better oiling etc. The TA Aluminum heads are by far the best flowing and if you are going to big time port and polishing not too much more money since they flow so well out of the box. The Dyno tests I have seen posted consistently rate the HP 950 as making some of the most power. There is a lot of talk about cams . What makes the most sense depends on the intended application. For example, street use and enough vacuum to run power acc. The dyno results of some cams are tested head to head on Tri Shield web site that flashes at the top of the V8 Board There are helpful articles on building at www.Buickperformace.com
