Tunnel Ram on a 383

Good luck with your Tunnel Ram
There is a reason they have long runners- high rpm 3000 -8000+

Last time I ran one was in 1982 in my F/MP 1966 Chevelle
301 ci 680 lift 290 duration @ 50 roller cam, 14 to 1 compression , hemi 4 speed pro shifted with 6.17 gears -tunnel ram with 2 800 cfm holleys

Have had few race cars since and still do