Part 18 - Cutting Intake Valve Seats on a VGS-20 - 620 HP 454 Big Block Chevy Engine Build 

As someone who is trying to get into the cylinder head porting industry, I learned that i need all of my own equipment and control over quality as most places don't really care. I needed to learn how to do things like proper valve jobs, valve guide installation, boring/honing etc. I just wanted to say thank you for uploading these videos! I have learned a lot from these!

I have never seen a set of tools for deshrouding valves like this. I am impressed.

Top notch stuff brother I would have the most confidence your work would be spot on everytime you machined anything for me. Nice quality work

Quite possibly the most informative and comprehensive vid series I have found on bbc builds,outstanding!

alot of work machining those heads really awesome watching the prosess

Valve job is absolutely perfect, I dont think you can buy an aftermarket head that is anywhere near this perfection.

I just wish every machine shop was that précised!

Love it.cant wait to hear this engine come to life

I really enjoy watching you do this with such a good set of eyes for detail. The video series shows a man aka Mark and it's not hard to see that he takes Pride in his work.

Great video! +++ Beautiful work. That's gonna flow great.

Incredible work! You are so good with using the machine, it's almost scary lol

Excellent work

BADASS! You do stellar work and definitely know your stuff...great job and awesome video!

i am truly amazed

Awesome thanks for the vids

Great fascinating detail Very impressive

super fint tänk om alla var lika noga med sina motor jobb många 👍

Fantastic work and craftsmanship Mark......it is easy to see why your builds put up the big power numbers that they do. Thanks for this great series.....I would buy an engine from you without hesitation. Maybe a 502 or 540 for the dually tow Rig?

you have made my engine builder look like a butcher ....Thanks

back in the day, my grampa used to drop a valve in like that except he would hit the seat with a little dry graphite spray. he could see the indications in the graphite how well the seat came out. that was with an old Winona machine.

Hey I don't know if this is been asked before but I'd like to see more of your shop equipment also

i wish you did pontiac heads

I have a low mile 454 , all I need is to pick up the right oval port heads. I'm going to build this motor for my dually ! Hope these machine services are still available ?

How wide is the 45 on the seat Mark and deg was the cutter you used in the bowl to clean the ridge below the 70deg cut? Extremely nice work Mark! it shows you have cut thousands of seats with speed and accuracy. You are a PRO buddy!

have you ever put a vacuum gun on the seats to see if they seal without spring pressure. and how does that machine make all the seats the same level. just curious about how accurate the cutter is because of deflection from only a one sided cutter. please forgive me i love your videos and actually have learned a lot. i only have stones and pilots. thankyou for all the videos and love the white chevelle.

BAD ASS !!

Very nice! 👍

Is there any specifications of the width of lap line, and I expect the episode to show how to change the bigger valve seat , not just cut it big by tooling

I know it's been a while so not sure if you will see this. but, on the unshrouding cutter, it looks like the bottom is rounded? What angle does it leave when the 35* top cut meets it? Would it be considered a 0* cut? Would something like a 15* or 20* work for unshrouding? Thank you

I also own a VGS20 with the SGM tooling and those seats you cut are really good. What is your typical runout on a 2.19 sized valve?

is that a crack in the intakeseat on 5:50 top left? topvideo anyway thanks!

You could certainly use some better lighting for your video work here.

Donde consigo una máquina de esa

never trusted single cut

Why wast your time on chev crap