[HPseeker]

I order the AFR heads with 74cc chamber size to get a 10.39:1 compression

Now the new question

,

the cam I was planning to install it got to much lift for the springs I order with the heads ,and another thing it needs 10.5:1-12.0:1 so I need to choose a new cam FOR THE NEW COMPRESSION 10.3:1
The solid xs274 501/510 lift, this cam will be a good choise for a 406 with 10.3:1 ?
the heads are 195cc AFR ,I got a Victor JR intake ,Please help me with this combo

 

[HPseeker]

After checking THE GREAT Pat Kelly's site here are my #s

8.43 dynamic compression

overlap 57 ,total cam adv 4
quench 44
distance of piston from BDC .7734
SOLID cam is a CC XS 274s-10
274/280
opens close
in 31 63
ex 74 26

8.4 dynamic compression it is ok or is to hight ??

 

[HPseeker]

I forgot to tell about the .005 piston to deck ,0.39 head gasket ,flat top 5 pistons valve relieve,74cc heads,may be this is the difference in DR ,THANKS ONOVAKIND67 ,all the help you and other can give me will be very helpful .

I can call AFR and may be ask them for a upgrade in the springs to install a xs282 ,244/252
.520/.540 lift

open close .@.015
35 67
79 31
but I am not sure about the powre rpm of this cam and a stock 400 crank
this cvam gives a DC OF 8.1 DYNAMIC COMPRESSION

 

[HPseeker]

ONOVAKIND67 you are correct the advertised duration for this cam is .015 tapped lift .that means the cam is at a lower Dynamic compression ??
I am confuse now ,should I ask Pat Kelly for HELP ??