Author: YO7_A66

I am installing my new push rods and adjusting the lash for the break in on my 340/420.

I always start out marking my adjusters at the 12:00 position with the adjuster fully seated. Then I count the turns on the adjuster while I am adjusting the cold …

Anyone running into issues with valve spring delivery dates?

I ordered a set of Manley springs/retainers/locators 5 weeks ago and the retainers/locators delivered in 3 days. I am now approaching week 6 for the valve spring back order and still have an…

I am thinking ahead of what type of coolant to run once I get my 340/420 back in the car this Spring. The engine was completely cleaned, and my radiator and intake were cleaned out too and sitting dry. I will be using new radiator hoses, and then the o…

I have started assembling my 340/420 and I need to start deciding on which intake to run. I currently have the following two intakes:
Non-Airgap RPM
Weiand X-celerator (small single plane)

I have gasket matched both of these to the same intake gaskets…

I just installed my cam and with the sprockets at Dot-To-Dot, the centerline comes out at 109 which matches the cam card separation angle.
The card says to degree it in at 105.
Do I just advance the cam sprocket 2 degrees and check the centerline agai…

I have my cam on order, and I have my recommended spring specs (145-150lbs & 350-360lbs). I have my springs chosen (“ISKY” 6105-SP) and now I am trying to dial in my installed height (on paper, as I will check my actual lifts after the cam install…

Windage Tray location up/down:

I am installing my windage tray on my 340/420 bottom end. I now have the ARP main cap studs that have the 3/8”-24 mounting studs for the tray. These are fully threaded so that the tray can be moved up/down to fit under t…