Thank you very much Cliff, I appreciate you taking the time to respond. Enjoy the day. Ty

Do NOT use a Thumper cam for any reason, they SUCK!

2801 Summit cams are good choices for 400 builds. At that compression ratio the 60916 is a good choice, but may also be difficult to obtain.....

Good afternoon Cliff, If you have a moment for a question that would be much appreciated. I am building a 400 with 9.5 compression, performer intake, #96 heads not ported, Hooker super comp headers, tkx 5 speed , 3.36 gear 66GTO. I had purchased a comp Thumpr hydraulic flat tappet and read your posts and would like to run a actual performance cam and thought the Crower 60242 or 60243 would fit the bill. Problem is there are none available. What would be a comparative type camshaft. Thank you for your time. Ty. Regina, SK, Canada

Thank you Cliff!!

I use and prefer the Crower HIPPO lifters for use on HR cams in these engines....

Good morning Cliff, hope all is well. I have finally got around to assembly of my 474 The last time we spoke you were helping me on camshaft selection. I decided on a Bullet Cams-hydraulic roller with 243/251 duration at .050. I need advice on which solid roller lifters to use, valve lash and if I need oil pinned lifters. Thanks again Cliff for all your expert help and advice.

Grind NO. PO 299/306-10HR
Intake Exhaust
Duration at .050 243 251
Lobe Lift .3677 .3680
Separation 110 OP-CL OP-CL
Timing Events @ .050. 15.5 47.5 59.5 11.5
Duration @ .006 299 306
Gross Valve Lift 1.5R 552 552
Gross Valve Lift 1.65R 607 607
Valve Lash (HOT) .000 .000
Degree Intake Lobe To 106

Michael, my emial is: cliffshp@embarqmail.com

If you have issues or need me to look at pics best to contact me there.....tks....Cliff

I've read through your TH400 book a couple of times this year and watched a few video clips of tear downs and rebuilds. If I get the tools I requested as Christmas gifts, I will probably start a rebuild on my TH400, which is actually an ST400, in January or February. I have obtained as much information as I can find on the few items specific to the ST400, but I remain intimidated. I plan to take lots of pictures, even video of my tear down in case I forget which way something was located initially. I may send a photo and a request for advice if I get stuck. I hope you and your family have a Merry Christmas.

I'm pretty sure I have one of those, will check today when I get to the shop. Send me an email to:

cliffshp@embarqmail.com

Better to correspond there..

Cliff,

Hope all is well…

Corresponded a couple of years ago on an engine build I was contemplating…took 15 months, but finally got it back from builder.

Anyway, I’m currently hunting for a Dashpot assy. For 67 quadrajet with auto trans.

Any chance you might have one? Or know someone who does?

Thanks!
Paul