it was originally built that way by doug harvey about 35 years ago, it was built soley for grass tracking, it had a 1050 dominator carb on it, used to go well ive seen cini camera footage he used to just drive around the outside of everybody and they all had small block chevys or jag engines.

i questioned the pressure myself as it seems excessive, cold start its right of a 100 psi gauge its bent the needle so 0 is now 15 psi lol.

but it was purposely done this way, i could see the journals had been messed with when i built it up they have a massive lead on them.
heads are the high performance double humps with the larger valves of the 60s and inlet is performance of the era.

not sure on cam but doug also removed vac advance and bolted it down it just runs mechanical, i think it runs about 20d mech advance as best i could measure, the one thing i did notice is not much vac at idle around 9 psi and a very small window of dizzy adjustment to get it running right ?