I have a full sized fairlane running a non roller 351w dynoed at 475hp without nitro. you can e them to do some good things but they need a different aproch. by the way i have 2 of them for sale compleat and running. the problem with the sb ford is the exaust valve and port. they ate soda straw small. if you port and widen this area you will get the best hp for the money. i can list all the parts in my motor if you would lie just let me know. my next build up i am looking for a 429 block if anyone has news of one cheep. talk to you lall later.