thanks for all the replies.

I know alot of things factor in,but how much HP can i get from a heads swap?(from RPMs to -1s)


thanks mike

The Indy heads pick up about 100 hp over the Edelbrock heads if you have the compression and cam.

Once again, if you haven't already purchased the heads then think about the EZ heads rather than the -1 heads. You can make 800 hp with the EZ heads which is going to be more than the stock block can handle anyway. No reason to put the -1 heads on there if all you're going to do is blow the bottom end out of the block.

The EZ heads allow you to reuse your existing headers and your rocker arms. You said money was tight so that seems like the way to go to me.

if you want a head that you can kind of "grow in to", the 440-1 is the way to go IMO.
those big peak horsepower numbers from magazine dyno mules means absolutely nothing until it's backed up at the race track.
the simple truth is that the 440-1 head will make more power at any and every point in the rpm band on the dyno AND at the race track. they've been a proven cylinder head combo for over 20 years, why reinvent the wheel.
that extra power is especially useful for the bracket and class racers that need the consistent E.T. and also want the big MPH. the -1 heads can really shine in that scenario.
for the guys with aftermarket blocks it's a no brainer over the EZ heads.

even though they cost a little more, they're much more cost efficient in the long run, even with the more expensive rockers.
now, with that being said, if your really budget limited, the EZ head "might" be a good choice, but the 440-1 isn't really that much more money.
to the statement of "blowing the bottom end out, that could happen on a stock block at 700 hp too, it just depends on the block and the combination of other factors. guy's have been succesfully making 850+ HP with -1 heads for a very long time.
in any event, the Harland Sharp rockers have served us very well over the last 15+ years and cost a bit less that some of the other offerings out there. i've never personally had one break although over time, any rocker will finally give way when the spring pressures and cycles exceed a certain point. i replaced a set earlier this year that were running on -1 heads for the last 12 years with 1.625 O.D, 850 lb springs. their was no appreciable wear on the shafts or the bearings. we put the old ones on a backup combo with less spring (650 lbs.) the change was made just to be on the safe side.
one other point, the HS rockers clear a 1.625 spring on -1 heads without any clearancing of the rocker. the same can't always be said for one of the other popular rocker choices available, even ones that cost more.
sorry this was so long winded. i just felt it needed to be said.

thanks Guys for all the info.I think I`m gonna try to go with the -1s,because there is room for growth(more cubes).


mike