like the tittle says if i buy headers now for my 305 and when i swap in my 350 will i have to buy new headers?

 

Not if the headers you buy now are large enough to not choke a 5.7.

 

ok thats kinda what i thought thanks

 

1 5/8 or 1 3/4 header size should work for a 305/350.

 

The block is the same so headers should be the same.

 

Headers don't bolt to the block.

 

i didnt think that needed to be pointed out on a car forum, so am i right to assume that the exhaust ports on all heads are identical in space between them, location etc? at least for a chevy small block

 

Yes, as long as you stay away from exotic things like raised ports.

 

ok thanks now shifting gears a little bit would you recomend long tube or shorteys? you seem to have a bit of knowledge on the subject

 

If it's going to be street driven, long tubes aren't worth the extra trouble.

 

whats the extra trouble if i buy a whole new exhaust?

 

Do a search and you'll see.

 

ok i will thanks

 

I never said they did.

 

only true if u have a lowered car. if my car was goin to be lowered i would have not run duals.

with my duals, i have no problems with clearence.it depends on how they are tucked. x pipes will yeild less ground clearence than an H-pipe. also the S-bends will have to be turned inward towards eachother.

u are however limited to what kind of mufflers u run. a thin style muffler will be best as far as mufflers go. i have dynomax bullets. loud mouths and bullets will give the best ground clearence.

 

I agree with Aperion. You can't "buy" an exhaust system for long tube headers. Whatever you do will have to be fabricated, and since a typical aftermarket system designed for '86-'90 TPI single cat will handle a street 350 just fine, going through the fabrication hassle (and probably expense) of long tubes isn't worth it.

 

There are more hassles than just ground clearance. I have long tubes with dual exahust on my 84 because it's my track car. For anything else that was street driven I'd save a whole bunch of my time, aggravation and money, and just bolt up a good cat back with shortys.

 

i think i might just buy some shorties, i seen a set from summit for $90 and then invest in a nice 3" catback or something but from what ive heard shorties are not that much better then stock manifolds and honestly i find that hard to believe

 

You get what you pay for with headers, as with everything else. If the $90 ones you saw were Flowtechs (or Summit's own brand, which are made by Flowtech), you're better off spending a little more money on something else. Those ones only have 1 1/2" primaries and a poor Y pipe design, which is barely adequate for a 305, let alone a 350.

 

oh i wouldnt buy them i was just sayin thats efin cheap lol so is flowtech a stay away brand? i was lookin at a set of hookers on there for roughly $200

 

Flowtech/Summit headers are the bottom end of the scale. They're better than manifolds, but not nearly as good as more expensive headers.

A popular choice is the Hooker 2055s. About $450 gets you the Y pipe as well (keep in mind many headers don't include the Y pipe when you're comparing the price), and they'll work with all the factory emissions equipment.

 

thats sounds like a good deal i dont want to spend 2 days foolin around just tryin to install headers then take em out again when i drop in my new motor