The "Vortec" engine is almost the same as an old school SBC, all things being such, the push rods are a little different for the OEM roller cams.
An increase in demand for the company's stock
An increase in demand for the company's stock
i wouldn't do it the vortec heads will have a diffrent port for the intake and intake mounting so you would need to replace the whole top end and in the big motors you can run into push rod angle problems but prolly not in a 78 easiest way to get the power you want is to put aluminum heads on or a power package from edelbrock, weiand, world, summit, jegs, or anyother major company
Keeping the plug wire out of the way, Start the engine. In a few minutes the engine pressure should push out the porcelain center from the plug. At this point you can use a tool called an easy out to remove the threaded part of the plug.
with one hand spin the push rod with other hand use a ratchet to tighten retainer nut when you feel the push rod start to get tight no up and down movement center ratchet handle facing the intake and go 1/2 to full turn to set the push rod in lifter if the engine is not a fresh rebuild allow 5 min for the oil to drain out of lifter adjusted then check if it feels loose go another 1/4 turn
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It's not really about what rockers you run. If you have guide plates, you need hardened push rods.
6-8 on stock 3.8 pulley. max is about 15-17.
In 1994 they started putting the vortec motor in the Blazer and the push button transfer case. Most of the body panels are the same.
long ones are exhaust
The rod should be 5.75 inches; assuming the correct year, size, and stock cam, fuel pump, etc.
it is an hour and 15minutes long