gt40 heads ? -

Go Back > Ford Mustang Tech > 5.0L (1979-1995) Mustang > 351 Mustang

gt40 heads ?

Thread Tools Search this Thread
Old 07-06-2014, 07:59 AM   #1
Join Date: Jan 2014
Vehicle: 89 mustang lx
Location: ny
Posts: 13
Default gt40 heads ?

i have a 351 blocked bored 30 over i want to put gt 40 heads with 1.7 crane cams roller rockers and a big comp cams am i goin to have clerance problems
swanny is offline   Reply With Quote
Old 07-06-2014, 01:27 PM   #2
6th Gear Member
bluebeastsrt's Avatar
Join Date: Jun 2006
Vehicle: 1995 mustang GT
Location: Jersey
Posts: 11,302

Sure your going to have some clearance problems. The engine will most like sit about 1.5 inches higher than a 302. Your talking a 9.5 deck height VS. an 8.2! You'll most likely run into header clearance issues. But it's a common swap. I think you'll want to change the motor mounts. I also think a oil pan swap is needed. There's probably a ton of guys that have done the swap in this section that can answer the question but I don't think you just drop in a 351. Good luck.
bluebeastsrt is offline   Reply With Quote
Old 07-22-2014, 03:10 AM   #3
2nd Gear Member
84CopperGT's Avatar
Join Date: Oct 2013
Vehicle: 1989 Mustang 5.0 Vert
Location: California
Posts: 193

Do you mean piston to valve clearance or engine clearance? Because those are totally different things. I would think you would need some big valve reliefs in the pistons for that cam/head/rocker combo.
1989 5.0 LX vert auto. Rear cats removed, flow 50s replaced with straight pipes. Quieter with no drone than with the Flow 50s.
84CopperGT is offline   Reply With Quote


Similar Threads
Thread Thread Starter Forum Replies Last Post
extnesion for radio antenna to head unit kevsgt 2005-2014 Mustangs 5 10-09-2015 11:12 PM
Head swap mustangheaven Classic Mustang General Discussion 2 10-07-2015 11:23 AM
4 Valve Head questions GimpyHSHS 4.6L (1996-2004 Modular) Mustang 6 10-01-2015 10:01 AM
cost to rebuild heads Drastang 4.6L (1996-2004 Modular) Mustang 2 09-30-2015 04:48 AM
351c heads mustangheaven Motor Swap Section 2 09-30-2015 01:12 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 03:41 PM.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company