LT Cobra Jason alot has to do with the money you have to put into the car. Motors are the crazy side of building a cobra. What you are going to do with the car would help? Cruising, car shows, roadracing, autocross, or girl magnet
. I have a BBF in my cobra. All Alum FE motor Built myself for under 15K. A small block all alum would be about 12-13K. Ford came out with the new BOSS block for 302. If you can find a set of westlake heads and webers, you have a rare cobra. 392-427 windsor alot of guys are racing. The parts are cheapier and easier to get that FE ones, and you get more bang for the buck. If power you want, FE motor, came in cobras looks great, Only a SOHC motor out ranks the SO motor in a cobra for YAAAA!!!. If you are going to straight racing all the time, a SBC or BBC would be cheaper to race and easier to get parts for. I am not a fan of bastard cars but some people like GM motors over Ford. You may want to look at Nascar site for used racing parts. Complete motors that are raced you can get for 8-12k. May need a dry sump tank for the motor. You can buy a crate motor with a warrenty for 2 years 24k miles that puts out 500 hp and 450 tork. The options are up to you. I like my FE motor and build another but using a stroker kit with BBC rods. Wieght wise my aluminium FE is only 60 lbs heavier than an small block. Side note that alot of the guys racing like that extra wieght on the front end for keeping the nose down at 120mph. Mine starts to lift at this speed. Rick L.