Best exhaust manifold? 65 c10

[spspspspoon]

65 c10 short step
3 on tree..3.73 rear
235/55/20 100 spoke knock offs..bout 30" tall
86 c10 front end
80s vette? squareport 350.. 5 way, port n polish, 194 heads thumper cam
Estimated 375-400hp at motor

Current random long tube headers work fine sound fine they dip below my frame rail

(they do keep my starter Hot off highway amongst other short comings)
I'm wanting shorts like block huggers or 2 1/2" ram horns
Cast iron retains heat more than metal of headers
Which is better and either dump straight down or back at an angle?

Going 2 1/2 back to cut outs between bed and cab then 2 1/2" in 3" out xtube or 3" slightly after
Probably boring frame to lay up in it
Curve above axle and dump on the down sweep

Headers cool faster
Without work are ram horns better
What about c4 manifolds?
They seem to be headers already

Had anot her profile but can't sign into it

Thanx

[raidmagic]

I've got a couple of sets of C4 manifolds. They are all independent tube header like manifolds. They are not even length tubes though. They work great for tight spots. If you're dead set on not having long tubes that's what I would do.

[andyh1956]

I'm running two engines with the Chi-Kneez Vette knock off Ram's Horns. No problems to report. Bought both sets at swap meets for 1/2 price!

[Captainfab]

With a manual trans in a '673-'66 you are pretty much limited to a rams horn style exhaust manifold.

[spspspspoon]

It seems tight..
350 in 6 cyl position
3 on the tree

Trying to figure also exit down or slanted..
Most stock ones seem unequal lengths to collector

Ram horn style or shorties sa me ability of clearence?

[spspspspoon]

Being rams are iron or such and headers thinner metal..heat retention? ?

[Captainfab]

In the '63-'66 trucks all engines mount in the same rearward location, whether it is a I6 or a small block. The stock rams horn manifolds dumped straight down. Yes the shorty headers will work as well as long tube headers designed specifically for the '55-'72 trucks. Yes the exhaust manifolds will hold the heat a bit longer than headers.

Originally Posted by spspspspoon

It seems tight..
350 in 6 cyl position
3 on the tree

Trying to figure also exit down or slanted..
Most stock ones seem unequal lengths to collector

Ram horn style or shorties sa me ability of clearence?

Originally Posted by spspspspoon

Being rams are iron or such and headers thinner metal..heat retention? ?