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tsmall07 09-21-2004, 08:11 AM i have an 87 thunderbird and i need to find out if it has a 5.0 ho or just a 5.0. the plate on top of the intake that tells you is missing and the vin code just says 5.0 efi. is there any other way to tell the difference. thanks surfmur 09-21-2004, 09:05 AM check the firing order is one way. HO uses the 351w firing order. littlemule 09-21-2004, 09:05 AM an 87 is probibly speed density and is probibly non HO. I dont think they put the HO in untill 88-89 ptie 09-21-2004, 09:23 AM was gonna say, easiest would be firing order http://www.allfordmustangs.com/techarticles/images/firingorder50.GIF tsmall07 09-21-2004, 10:10 AM i did make the firing order the same as my truck's 302 and its running like the order is completely off. this is a very good sign for me :D . i'll change the order to the 351 and see if it runs better. :smokin: thanks tsmall07 09-22-2004, 01:44 PM was gonna say, easiest would be firing order just so you know that is the firing order for a regular 302, not the HO and mine is definately an HO | |