Quantcast 351M/400 Tips and Tricks - Ford Truck Club Forum








New Posts



Remember Me?
       Join for free!




FTC Toolbar

Social Sites


Ford Truck Club Forum > GARAGE TALK > Garage Talk: Shop Class 101

Welcome to FordTruckClub.net
Welcome to FordTruckClub.net, the internet's premier Ford truck community! You are currently viewing our boards as a guest which gives you limited access to view discussions and access other forum features. By joining our free online community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple, and absolutely free so please, join our community today!

Forgot your password? click here.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools Display Modes
Old March 18th, 2012, 01:59 PM
BigBlue79's Avatar
BigBlue79 BigBlue79 is offline

Join Date: Sep 2011
Location: Sapulpa, OK
Posts: 5,895
Images: 1113
Likes : 14
Liked 49 Times in 42 Posts
Default 351M/400 Tips and Tricks

So you've got a 351M/400 in your truck, these were found in 1977-1982 Ford Bronco's and the F-Series. These were pre-emissions smog engines, so basically they were Generation 1 of your smog. The first thing that can be done for the budget minded person is a timing gear and chain swap, what it entails is buying a 351c timing set(less than $25 for LLT Cloyes) and installing this set either(your choice) 2* degrees advanced, or straight up, now keep in mind this is for a stock engine with NO aftermaket cam. You will notice a power improvement, next I see guys replacing their stock 2bbl intake and carburetor with a 4bbl and NOT doing anything to the heads, just because it runs doesn't mean it's at it's peak, I've stalled one more with a 4bbl on it than a 2bbl, engine's are like air compressor's, make it breathe in it's gotta breathe out, so atleast port the heads, have the emissions hump in the head ground down, clean up your pushrods and rockers and check the valve springs and valve's while it's off. After you've done these(budget mindedly) then you can slap on a 4bbl and some headers, I believe Heddman are the best for Bronco's BUT you must remember, longtube headers will put the collector's right at the front of the crossmember, I DO NOT recommend running the pipes under the crossmember, that's asking for a world of problems. You probably have to make an angled turn-up to get over the crossmember then run it back.

If anyone has anymore feel free to add.
Old March 18th, 2012, 02:20 PM
Ridgerunner's Avatar
Ridgerunner Ridgerunner is offline

Join Date: Mar 2012
Location: Back to NC one day
Posts: 1,589
Images: 60
Likes : 4
Liked 4 Times in 4 Posts

Excellent write up.
Old March 18th, 2012, 02:38 PM
JSoko's Avatar
JSoko JSoko is offline


Join Date: Jun 2009
Location: Northwest Georgia
Posts: 12,876
Images: 586
Likes : 22
Liked 115 Times in 97 Posts

good going Blue
on a side note
if you can keep your foot out of it a 4bbl will give you better MPG than a 2bbl
point being most 2bbls are about 550 CFM as compared to the primarys on a 4bbl at 350-400 CFM

but that all goes out the window when the secondaries kick in; need a little more speed suck a little more gas

For Those Who Fought For It...
Freedom Has A Taste The Protected Will Never Know.

Thread Tools
Display Modes

(View-All Members who have read this thread : 16
BigBlue79 , Bjones , Booba5185 , CSRadel , Dave8N in Pa , duke daddy , jamesgang , jeffb100 , JSoko , Lawman1775 , Mtgoat , pretorian , Ridgerunner , Russo2 , windigowolf , woody36206

Similar Threads
Thread Thread Starter Forum Replies Last Post
78 f150 351m owners who have replaced there intake! READ PLEASE! 2010Iron883 1973-1991 Ford F150
4 February 26th, 2012 10:49 PM
78 4x4 351m, 2bbl carb please help! 2010Iron883 1973-1991 Ford F150
12 February 24th, 2012 11:39 AM
Exhaust Tips & Quick Tips [S5 Ep. 6-4] Gearz Gearz 14 December 20th, 2011 10:59 AM
Exhaust Tips / Quick Tips - Drill Depth Gauges [S5 Ep.2-4] Gearz Gearz 0 December 17th, 2011 06:51 AM
Tips for Car Stereo Repair JSoko Garage Talk: Shop Class 101 0 June 2nd, 2011 10:54 PM

351m or 400 , tips , tricks

Forum Jump

FordTruckClub.net is not authorized, endorsed or affiliated with the Ford Motor Company
or any of their subsidiaries. Ford® is a registered trademark of the Ford Motor Company

Powered by vBulletin® Version 3.8.6 Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.