[351stanger]

hi,
my 408w includes these parts so far and i am looking at headers and cam for it now.

72' 351w block
4" eagle cast crank
6.2" eagle h beam rods
keith black forged pistons 10.6/11:1 (undecided, would 11:1 work with 93 octane?)

rhs 215cc iron heads 2.08/1.60" port matched
trick flow valves
comp dual springs
comp magnum roller rockers

victor jr. intake port matched
850 mighty demon

t-5 transmission
street/(mostly)strip driven
67' mustang coupe

would 1-5/8" or 1-3/4" headers be better? those seem to be my only 2 options for production long tube headers. and what would be better: 2.5" or 3" dual exhaust?

and i was thinking of an off the shelf cam instead of a custom grind. does anyone have a recommendation on what to use?

thanks,
carl

 

[qtrhors]

1 3/4 long tubes

Lunati voodoo 61005 cam or custom

11-1 with iron heads is tuff....maybe 10.5 with 30^ total. Its all combo dependent.

 

[ou812]

1 3/4 header, and pump gas/iron heads and no coatings means you need to stay below 10:1 compression realisticly.
If you dont mind mixing race gas and pump gas, 11:1 will be fine.
Cam is dependant on what you want...hyd roller, hyd, solid...etc.
I recommend with 9.5 compression, a cam in the 240's @ .050.
That 4" arm will want to breath, and those heads run out of steam around the 6000rpm mark.
If you go with the higher compression, I would use a cam in the 250's @ .050 and run 3" exhaust all the way back.
Brian

 

[351stanger]

thanks for your guys help,
if i were to go with the aluminum version of those heads would the higher compression be more feasible? and for the cam, what would need to be done to the block to run a solid roller?

im pretty sure i may try to get a set of aluminum heads, the higher compression and a solid roller by comp cams. (110, 254/260 @.050", .621/.627" @ .050")

does this sound ok to you?

thanks again for your help.

 

[89 coupe]

I would run the 1 7/8" primary headers at the minimum because those heads and the cam you are considering will move some air and with a full 3" exhaust the headers will work great. Here is a link to both 1 7/8" AND 2" primary headers for '67-'70 Mustangs(and Fairlane/Falcon/Torino/Cougar/Comet): http://www.accufabracing.com/exhaust.htm#HeadBolts
They are high quality headers and for the price you can't beat 'em let alone find any large tube for the early Mustangs. Accufab stepped up to the plate and have these available.
Those Pro Topline 215s/RHS215s flow pretty good and will support 7000-7200RPM shift points in your 408 without any porting but they really respond well to porting if you can do it or get it done. I am running the iron Pro Topline 215 heads with KB 116 hypereutectic 302 pistons in my 392 and a solid roller close to what you are considering (290/300, 256/266 at .050", .656/.656 lift, 108LSA/108ICL). I would suggest not using the Victor Jr intake as it is a restriction to the 215s plus a bit undersized for a 408 with those heads and cam. Super Victor intake port matched. With a decent cleanup of the heads, port matched Super Victor, solid roller with similar specs, and 11:1 compression you should be able to get 600+ HP out of it and drive it daily on pump gas with some racing using a little mix of race gas. Get the 1 7/8" headers and that will allow for future upgrades for more power. For comparison sakes I run the 393 with iron 215s home ported, Super Vr intake, KB pistons, cam above, 1 7/8X3.5" headers, 3.5" exhaust, 1050 Dominator, 4.30 gears, 28x10.5 ET Drags and C4. Suppose to be a 4500 stall but it actually stalls at 5800. 9.81 @ 135 naturally aspirated at 3350#s, stock suspension and street driven/street legal. Very responsive and VERY fun to drive yet low budget and reliable. Your 408 should make good power with your proposed plan. Those pistons are tough and the heads work well.

 

[P64falcon]

I also stepped up to the 215cc aluminum heads for my 393 and comp still recommended the XE286R. Have you called them for a recommendeation yet? Or is the Compcam you cited more of a starting point.

 

[tonys10sec306]

I would also go with 1/7-8" headers

 

[351stanger]

thanks for your guys help. i was looking for a source of larger primary tube headers for the older mustangs for a while. i bought my vic. jr. for 75$ so i can turn a profit on that and get the super vic.

i will probably go with the keith black 10.2:1 pistons for now and mill the heads later on.

p64falcon,
that cam was just something that looked like it would be good from what i have read about the 408w setup. i will have to call them before i buy to see what they say though.

thanks again,
carl