Very impressive! I may have to build a Tunnelport now!

This is a pushrod oiling setup. I blocked the deck passages. Oil wasn’t  making it to the lifters at all, until I drilled out the upper galley

I love this build. My first 427 was a Tunnel Port at age 18. I sand dragged it in a ‘70 F250 4x4.
It taught a lot of 460’s and BBC’s a lesson. Came on like a two stroke lol. Tunnel Ports will always be the coolest. Can’t wait to see how the build progresses

I talked to BBM yesterday. They said December for new blocks

KMcCullah,  This is a Kryptonite billet 4.125 with center counter weights and GRP 6.8 Rods. Bob weight was in the 1900’s. I’m glad you haven’t had any issues. But it would make me a little nervous. Upgrading to steel caps is probably a good idea if it gets raced much. Sweet trucks by the way

Thanks for the replies. If you know others with the same experience, then I guess it’s “par for the course” with these blocks. Time for a Pond or BBM lol.

It made a lot of power but not enough to do this!!
This is a 501” Genesis block built for sand drags in a bronco. Spent the summer ironing out issues.
But it only has five passes on it. 16:1, Blue Thunder MR heads raised to HR, sheet metal intake, dual 1180 SV1’s , solid roller, shifting at 8000. My first pass of the year exposed ignition issues, wouldn’t rev past 4000.
Swapped to an old Msd 7 the day before the next race, but didn’t have any rev limit pills. Decided to race anyway because I wasn’t planning on pushing it that hard. That was a mistake. Spit out the pinion on launch and went to 9000. Valve train kept up though, no bent valves or other issues.
Upgraded the rear end and was ready to race in time for Labor Day. This time made several solid passes. Ran fantastic, pulling to 8000 and turning great times even though in 2wd. After my last pass,
Oil pressure dropped considerably, so I decided to be satisfied with the performance and put it on the trailer.
I speculated that perhaps I hadn’t let my oil get warm enough before making passes and wiped the mains. However, when I pulled the engine down today, I found split main caps and cracks in the main saddles that run all the way up the cylinders. Engine makes an honest 850hp based on times.
Could detonation cause this much damage? I ran Sunoco 116 and crank trigger at 32 degrees.
I did find an air leak early on that would create a lean condition but it was never raced this way.
Thoughts please! I tried to attach pictures but I’m too stupid. I’ll see if I can figure that out

I’m using 6.8 GRP rods with a 4.125 stroke in genesis block. No clearance issues. Tightest spot was a couple cam lobes. .457 lobe and the closest was .100....Sooo maybe a 2.00 or 2.100 would work with a 4.375???