My notes say that I used Comp 7228-16 but I honestly don't remember. This wasn't a magazine build so I didn't keep really good records. The picture I posted seems to confirm that they are indeed conical springs so I'm going to assume that my notes are correct on the part number.

Two questions, is there a beehive spring that fits your cam? And what can be done with the tunnelram? Many years ago i had a 535 with 906 heads, picked up .15 et in the 1/4 by hogging out that tunnel ram on it. Those two together might make a big difference. If you have a converter built to 340/hemi specs, it will flash over 3,000 rpm , (3400?) a nd that allows a little leeway in manifold tuning, i would think.

Congrats getting it going!

There was a BBM on the dyno here last week.
Not a build we contributed to...... just provided the dyno service.

TF heads with their HR springs(PAC 1294), TF HR cam, Howard’s HR lifters(not sure which version), HS 1.5 rockers.

Tthe report I got is things were solid thru 5800rpm, and at 5900 the lifters gave up.

Those heads come set up with the spring installed height at a nominal 1.950”.
The specs for the PAC 1294 are 154@1.950/410@1.350.

5900 is a little low, I bet the owner was unhappy with that. The TF cam really needs to be pushed past 6000 rpm with a 440 to make peak power.