[grivera]

Looking for the ideal HR cam recommendation.

My goal is a 550+ hp street car that can be driven anywhere within reason, NOT a daily driver. I’d like it to be well into the 11s. Pump gas friendly - 93 octane is highest available in my area. Ideally enough vacuum for power brakes but I’m not opposed to adding Hydroboost.

What I have on hand:

1966 Lemans, full street trim and interior, flat hood.

455 .030 short block in chassis with 4.21 crank, h-beam rods, pistons have 4-5 cc valve reliefs and are about .014 below the deck

Dougs headers with a 3” exhaust all the way to the tails and electric cut outs

TH400 transmission- converter not purchased yet

Gear vendors unit installed

12 bolt posi with 3.90 gears

I have two sets of heads on the shelf:

KRE 310 cfm 85cc D Ports, set up for 1.65 rockers and .650 lift - KRE says springs are 1.85-1.875 install height with 135-145 on seat and 370-390 open pressure. I don’t have the port size on these heads off hand but can measure later and advise.

KRE 85cc D Ports, un-ported, intake ports matched to RAIV gasket size

Comp Cams KRE 242/248 (XFI Lobes)

Intake: 292 adv** 242 @ .050**.365 lobe lift

Exhaust: 300 adv*** 248 @ .050* .,362 lobe lift
113 Lobe sep

Comp cams hydraulic evolution roller lifters

KRE Northwind intake, as cast

Torker II intake, as cast - will port match to heads

Harland Sharp 1.65 rockers

Scorpion 1.5 Race Series rockers

Holley 850 Double Pumper 4781-5

Based on the Wallace compression calculator I come up with about 10.25 compression.

I’m open to having the heads surfaced to bump up the compression if need be, but of course working with what I have will be easier.

The original Old Faithful comes to mind for me - it’s a 236/245 duration, .570/.574 lift (magnum lobes).