My 505 build

[496polara]

Hello,
This is the motor we put together for my 72 Duster street car. The parts selection was heavily influenced by a lot of builds here and especially @Challenger340 .A huge thanks to him for the wealth of knowledge he has shared.Many others as well.

75 model 440 block
4.25 stroke crank (Used 440 source bought and checked by Dram 10+ yrs ago) shocked
Rods and Pistons from 440 source coming in at 10.0-1
Hyd roller comp cam spec'd by Dwayne Porter coming in at 247*/253* @.050 with .59X I and .58X E (Cam card at builders) on a 110
Trick Flow 240 heads (out of the box and look great per the builder)
Harland Sharp 1.5 rockers
MP M1 single plane
Builders 950 on the Dyno
TTi 2" headers on Dyno and in car.

617hp @ 5400
652tq @ 4600

Dyno operator had issues with the Dyno and no tuning time so the numbers are what they are. It had 642tq at 3981rpm as the lowest recorded number. Still had 606 HP at 5800 rpm. Dyno is known to be on the conservative side compared to other dynos in the area.