408ci iron block 11.28:1 SCR
6.0L block
Eagle Forged LS1 Crank 4" Stroke
Callies LS1 Rods
Diamond Pistons(-2cc)
AFR 225cc 72 heads (unmilled for now)
Cometic Gaskets (.040 thick)
EDC custom Cam (not sure on base circle dimensions)
Comp 850-16 OE lifters

Using Comp Cams 7702-1 pushrod checker which is 6.8 base length. I had to open it Approx 10.60(comp states 0.050 increase in length for every 360 degrees turned on pushrod) turns to reach zero lash, using the procedure found here in post #2 (https://ls1tech.com/forums/showthread.php?t=465218).

So 10.6 * 0.050 = 0.53

6.8(original length) + 0.53(increase) = 7.33 + 0.065 (preload) = 7.395

So I guess I need 7.4 (stock length) pushrods huh? LOL

Anyone see any issues?

 

math looks right, I'll bump it for you and to get a second opinion. by the way what rockers curious.

 

Stock Rockers. I am hoping they will last the summer and then I plan to have a harland rebuilt/updgrade.

 

Does this seem feasible that with the AFR heads, thinner head gasket, and probably different base circle on the cam that the Pushrods would stay the same length as stock?

Thanks

 

well my afr unmilled heads, mls gaskets and f13 cam i measure 7.370" with zero preload and will be going with a 7.450" PR for about 0.080 preload

 

Well, I already ordered the 7.4s overnight so I guess I will find out tomorrow.