I have a 1981 351W it was a 2brl to start with and it came out of a f150! Here is a list of all of the upgrades I put a set of ported and polished heads with the large valves 1.64 and 1.90 ,BBK 1 7/8 headers,roller rockers, edelbrock rpm intake,eldelbrock 600cfm 4brl carb performer rpm cam, accel super coil, accel 300+ wires and plugs, msd distributor, and a high volume oil pump! I would love to know a good ball park figure I would guess around 300hp or so what do you think!

 

Can Anyone Tell Me About How Much Hp It Has I Would Really Appreciate It Thanks!!!

 

I can only venture a guess, based on published fiugures of similarly built Ford crate 351 engines.

The Ford 351 HO SVO made 385 HP at 5750 rpm and 377ft-lbs of tourqe at 4500 rpm. This motor used Aluminum Turbo Swirl heads, and a very stout cam, so yours will probably be somewhat less, with peak hP coming at a lower RPM.

The 351 GT40 SVO motor used cast iron GT40 heads and a cam fairly close to the Edelbrock RPM. This motor made 346Hp at 5750 rpm, and 364 ft-lbs of tourqe, at 4250 RPM. Depending on the quality of the porting job, your heads may flow slightly better than un-ported cast GT40's.

The stock 351 Lighting short block using un-ported cast GT40's, and the GT40/Cobra EFI induction parts made 310 HP.

 

Thanks a lot for your info I don't know where to look or go to find out that kind of info! I was thinking around 320 to 360 hp range so I guess I wasn't to far off but I would love to get it on the dyno some where! THANKS again!!!

 

stroke it out to a 393. thats were your gonna get good hp numbers

 

I still want it to be reliable for daily driving other wise I would love to bore it out to a 393 but it was just rebuilt so I don't want to through that money away!