[Keithc8]

The aftermarket blocks have corrected the oiling problems you see with a stock block and are very strong. We build some 514 engines for the guys that are 10.8 to one with the ported Edelbrock or Ford Racing Cobra Jet head and hydraulic rollers that make about 700HP with the Edelbrock single plane intake and 950HP. This pretty easy to do and we do some 600C.I. drag engines with single 4bl. that make 1100HP and are very dependable with mild style roller cmashaft for bracket racing.
In a Cobra I would much prefer the aluminum block because of the weight of the steel block. We have built them in all forms depending on the budget. Keith