273 said

Here's probably the tf used with the 217 cam to make 500 hp with 5.3l and mopar tf but there has been no signs that the mopars tf would do 500 hp with a 217 cam.


View attachment 1716281294 View attachment 1716281295



Here's the 799 heads the 5.3l started with and got 480 hp with a 221 cam

799 6.0L (and 5.3L) Castings
Valve Size: Intake - 2.00, Exhaust - 1.55
Port Volume: Intake - 209 cc, Exhaust - 74 cc
Combustion Chamber: 64.0 cc
Target Bore Size: 4.000 (and 3.780)
Chamber Diameter (distance across): 3.876
Flow data
Lift	In.	Ex.
0.050	31.1	24.7
0.100	65.4	52.6
0.200	142.2	98.1
0.300	193.5	133.5
0.400	230.2	160.1
0.500	243.4	175.5
0.600	248.1	185.8
0.650	249.3	188.2
0.700	250.2	191.1

Click to expand...