Originally Posted by mprice

On paper the 351 doesn't look like that big of an improvement over the 302 because the HP numbers are close. The big difference is the RPM for peak power, where you get peak HP out of the 351 at about 3,500RPM but with the 302 you'll need to spin it closer to 4,500RPM to get all its power. You really need to drive the 302 a lot harder to get it moving compared to the 351. When I replaced my 302 equipped Bronco with a 351 I told my wife to make sure she watched the speedo closely. When she came back she said, "I am sooo going to get a ticket in that truck." Not because it's really any faster but it gets up to speed with a lot less drama.

Originally Posted by JMC302

I've worked on 302's for many applications and I have never been disappointed by one in either a car or a truck. True the 351 will give you an easier pull up to speed and haul a better load, but for everyday driving the 302 will do just fine and burn less gas.

Since it is a 92 5.0 it will NOT have forged factory pistons...last year for that in the HO motors was 91. It has E7TE truck heads and a roller cam. Are you running the truck intake or the 5.0 HO intake? I'll throw some modest ideas out working on some assumptions...basically the assumption that it is a 92 Mustang 5.0 from the oil pan rail up through the upper intake.

I would say swap to the longer runner truck intake, which should give some more low end power, and swapping to a different cam might not be a bad idea. I think the B303 cam is supposed to be decent for heavier vehicles...or look for an RV spec cam, but I would try and stay with a roller cam since that is essentially free HP. A tubular non-cat Y-pipe and a cat-back would round things out too. All told you won't improve peak numbers by much (if anything) but it should improve the feel.

If you are running a tranny with OD a gear swap might be a nice change as well. Let the higher rev potential of the 302 work in your favor.