95
The first of your sentence talks about heads
did you then switch to cams?
still need to know all your mods/ planned mods and ultimate use
Here is a 260 at .006 inverse cam Comp also specs theirs at .006
260 @ .006
208 @.050
128 @ 200
.327 lobe lift
.556 lift with your 1.7 rockers (.523 with 1.6) .490 in a LA with 1.5

If your heads do not flow much more over .525 lift
260 @ .006
210 @ .050
132 @ 200
313 lobe lift
.532 valve lift with your 1.7 rockers

as you can see the second cam has quicker action but has to back off that quicker opening action to prevent valve float resulting in slightly less lift- there is no free lunch

if your heads do flow well at higher lifts and you can take 4 more degrees duration (it does make a difference in your low end, especially with stock compression
264 @ .006
218 @ .050
130 @ .200
340 lobe lift
578 valve lift with your 1.7 roockers

only 4 more degrees off the seat but 8 more degrees at .050
would run like a 280 degree cam without loosing much low end

with a cam like this, or any of them, you have to check your rocker arm geometry to ensure pushrod lengths, valve stem contact patterns

 

still stock heads and cam- trying to decide which of each to get yet
street use 0-4000 rpm

 

Just stick withthe 1.7 rockers
new timing chain
If you do the stock heads you can blend the bowls- new valve springs and seals, guides
1.92 valves with 30 degree seats on the intakes work well as the stock 45 is now the blend cut and you get a fresh seat without sinking the valves- which hurts
with 2.02- too big with 45 degree seats-- ok with 30 degree seats
a high lift cam will be wasted on stock head
shorter seat duration with more lift would be best but lots of expense for little gain
Maybe Crower- I forget
in your rpm range the flow at low lifts is most important (is for all as that's where your velocity starts)

 

both edelbrock and eq heads ( the ones listed anyways are 2.02) been told on a 318, 2.02 too big and leads to valve shrouding but others dispute that.
Looked at crower but their website lacks any description of the 5 cams they offer for the magnum v8

 

the Indy MA-X heads were another I am considering

 

there would no gain to going from 1.7s to 1.6 and a cams like http://www.hughesengines.com/Index/p...r&partid=11442 or something similar?
most likely will end up with 2.02 heads

 

Hughes makes excellent products
If you plotted the VALVE lift of that cam with 1.6 rockers vs the stock 318 cam with 1.7 there would not be a lot of difference.
On the Hughes cam the .050 durations are appropriate for a torque/ towing/ resonable mileage rig with stock gears and converter for a non inversus radius grind.
Does Hughs say what the .006 durations are?
With a regrind/ and or big grinding wheel grind they may (or may not) be excessively long.
There is no reason I can think of not to keep the 1.7's with that cam but ask Hughes

Crower has a similar grind 198 & 205 @.050 showing seat durations of 246-254 @006 with similar lifts of .486 & .515 with 1.6 rockers
You want the seat timing as short as possible with the lifts as great as possible
so compare- not inverse radius in their short Hyd rollers
to compare with the above
crower number 34414 268-277 @006 204-208 @.050
notice how the seat timing has to be at least 8 degrees bigger to be around the same at .050 or to similar lifts

 

hughes is basically saying the same thing..no real difference between their cam and having 1.7 rockers
crower and crane have gotten back to me so far.. they say I can use my 1.7 rockers with their cams crower 34414 and crane 704111

 

Crower 34414 is, if my old memory remembers, is bigger than the Hughes you mentioned.

around 268 @006 and 204 @ 50 with around .500 lift with 1.6 rockers
just checked the catalog - grind is 204Hr213 which would translate to 204 @50 Hyd Roller
All Crower short duration Hyd rollers are not inverse radius
let's compare with the above inverse cams
One had 264 seat duration or 4 degrees shorter than the Crower but had 218 @ 50 -14 degrees MORE-and tons more lift
the others had 8 degrees less seat duration but had 208 or 210 @ 50
much fatter
that 8 degrees less seat duration makes a BIG diffrence
Did you find out what the seat duration was on the Hughes?

 

Lots of good head info on the Hughes site- take time to read it all
BTW
when Hughes talks about "Chrysler Only" cams they are refering to flat tappet and flat tappet hyd lifter cams where the .904 lifter does make a BIG difference.
Other grinders DO have Chrysler special cams
Even Isky has ONE a famous early Stage Wedge super stock grind and while obsolete we still use it to dial in chaisis...
Engle has cams like the H7 available while showing Chevy grinds in the consumer catalogue
The late Chet Herbert had several- but you had to ask
Crower has some, I used one for 440 Magnum replacement around .500 lift withless seat duration but around 218 @.050
Jones has THE max cam in the 204 degree at .050 range to replace the stock 440 cam but with only 256 at .006 and .305 cam lift (Magnum type 450 lift with 1.5 rockers)
The Stock Magnum cam takes 268 at 006 and 214 @.050 to get around the same lift- the 340 (360 hi po) cam is around 209 @.050- really lazy cams
This is a real performance cam in a LA and a great torque/ tow/ motorhome cam in a big block
Hyd rollers are a whole different story