348 Tri-Power Build gone wrong / Follow New Rebuild
- Thread starter '37-4D
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'37-4D
Well Known Member
They used new push rods. Ill check the invoice to tell you what they are.
'37-4D
Well Known Member
@Don Jacks, the shop guy says it's the nuts that are hitting. They took them off and it still wasn't enough clearance. Need a 1/2" extra to clear. And they aren't just touching a little, they are touching a lot. Without the lock nuts on, it almost clears.
As far as rockers and pushrods (all supplied by Show-Cars), there is no valve train interference, it turns over perfectly.
They will deal with the rounded rockers and use them appropriately.
Says, stock or dress up valve covers don't fit big rocker arms. This is the result of a non stock motor.
They will check the rod length.
show-Cars did spec the wrong keepers. Wouldn't put it past them to have specked the wrong push rods too!!!!
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The 817 and other small port heads have about a 1/4” lower valve cover rail than the big port heads. The pushrods in your set up do look quite long. I’d be double checking the length.
You may want to check the poly locks to make sure they're not long ones meant for a stud girdle,but I would definitely follow the advice given about double checking rocker geometry and pushrod length,something just doesn't look right its hard to tell by pictures but the rockers look pretty high up the stud.
'37-4D
Well Known Member
@Don Jacks This is what Show-Cars spec'ed
Only 2 rounded rocker arms in the set for #1 and #8
My friend at the shop assured me that everything else is good. The 2 push rod lengths (intake set and exhaust set) are installed in the correct spot. The entire thing will be double and triple checked. It's not going anywhere until it is absolutely perfect. We have to give them some credit, they've been in business for 40+ years. Pictures can be deceiving is what he said. Told me to relax, take a sit and enjoy the show LOL
Only 2 rounded rocker arms in the set for #1 and #8
My friend at the shop assured me that everything else is good. The 2 push rod lengths (intake set and exhaust set) are installed in the correct spot. The entire thing will be double and triple checked. It's not going anywhere until it is absolutely perfect. We have to give them some credit, they've been in business for 40+ years. Pictures can be deceiving is what he said. Told me to relax, take a sit and enjoy the show LOL
'37-4D
Well Known Member
Made complete sense when you said it. Me too. Looks like they have been engineered for Big blocks but not with the 348/409 in mind, so this could be specific to BB stock valve cover perhaps?!?
You did a fine job putting it together. 
The push rods appear to be 5/16 but can't tell for sure. I don't see where Show Cars lists 5/16 push rods for a roller cam. I am glad your shop guys have it covered. BTW your finished photos of the truck look great!!!@Don Jacks This is what Show-Cars spec'ed
Only 2 rounded rocker arms in the set for #1 and #8
My friend at the shop assured me that everything else is good. The 2 push rod lengths (intake set and exhaust set) are installed in the correct spot. The entire thing will be double and triple checked. It's not going anywhere until it is absolutely perfect. We have to give them some credit, they've been in business for 40+ years. Pictures can be deceiving is what he said. Told me to relax, take a sit and enjoy the show LOL
'37-4D
Well Known Member
If you are referring to the last set of photos, those are from the first build dating back in 2017. The heads were the smaller 791 heads. And the Moon chrome covers worked well then.
The new build is a whole new animal using the 333 big port heads. Covers would have worked if it wasn't for the much bigger Scorpion rocker arms. They are substantially bigger than the stock ones that were on there before. I hope that I answered your question
'37-4D
Well Known Member
Yes. They are Canadian covers. No Chevy logo and they have a tab for the plug wires.
'37-4D
Well Known Member
I don't mind parting with it. I have to check and see where they are. DM me as a reminder and we can discuss. They might have a little dent or two if I recall. I'll check.