need info about 1980 351

CHRIS75 · 03-16-2004, 09:12 PM

Hey guys i have looked at every thread here about the 302 to 351 swap and im going to do it real soon but i need info about which block are the best. i plan to run 393/396 cid in my 86gt but before i look in salvage yards for a block there is a guy who will sell me a 1980 351w police engine complete for $300 is this block any good or should i look for something else? what parts do i need for the swap, my 302 is carb with edelbrock performer intake and carb,bbk shorty headers,mallory uni-lite distributor and msd 6al,what can i reuse and what do i need to buy oh by the way my car is automatic thanks again

blk88lx · 03-16-2004, 11:29 PM

You need a 351 double sump oil pan (crown vics had'm so maybe you police engine will), You cannot use a 302 distributor or intake. You'll also need headers. Get a low profile intake and you should be able to keep your hood, I did with my carbed 351. My EFI 351 needed a raised hood.

I know the 1969 5.8s were the strongest but after that I think they were all the same. I think.

84GT350-1 · 03-19-2004, 05:48 AM

try to find a 74 351W or earlier block, they are the strongest. the later blocks are good to around 500 Hp from what I have read. Also I don't think the police 351's were anything special other than having the truck rods. If you lived closer I would sell you a 351W cheaper than the salvage yard guy..

DirtKing · 03-21-2004, 03:46 PM

two schools of thought:

74 and earlier blocks have more metal..
later blocks have better metal and casting practices. i suspect it is a wash, but who knows??

03-16-2004, 09:12 PM	#1
CHRIS75 Registered Member Join Date: Mar 2004 Location: Maine Posts: 67	need info about 1980 351 Hey guys i have looked at every thread here about the 302 to 351 swap and im going to do it real soon but i need info about which block are the best. i plan to run 393/396 cid in my 86gt but before i look in salvage yards for a block there is a guy who will sell me a 1980 351w police engine complete for $300 is this block any good or should i look for something else? what parts do i need for the swap, my 302 is carb with edelbrock performer intake and carb,bbk shorty headers,mallory uni-lite distributor and msd 6al,what can i reuse and what do i need to buy oh by the way my car is automatic thanks again __________________ 86 GT, Edelbrock Performer Carb and Intake, BBK Shorty Headers, MSD 6A, Mallory Unilite Distributor. 83 GT, 351W T5, Holley 750 carb, Weiand sleath intake (parts car) Mods to come: 351W, Suspension, Manual trans, Paintjob Last edited by CHRIS75; 03-16-2004 at 10:14 PM..

03-16-2004, 11:29 PM	#2
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	You need a 351 double sump oil pan (crown vics had'm so maybe you police engine will), You cannot use a 302 distributor or intake. You'll also need headers. Get a low profile intake and you should be able to keep your hood, I did with my carbed 351. My EFI 351 needed a raised hood. I know the 1969 5.8s were the strongest but after that I think they were all the same. I think. __________________ 93 GT, 5.8 EFI usual bolt ons, 3.55's, subs, hurst, K+N 78 F100 Short bed, 5.8, dual pipes 4 bbl 03 Sable

03-19-2004, 05:48 AM	#3
84GT350-1 Registered Member Join Date: Nov 1999 Location: Willard Ohio Posts: 60	try to find a 74 351W or earlier block, they are the strongest. the later blocks are good to around 500 Hp from what I have read. Also I don't think the police 351's were anything special other than having the truck rods. If you lived closer I would sell you a 351W cheaper than the salvage yard guy.. __________________ 1967 mustang fastback drag car. tube chassis. 468 BBF.. 1989 LX notch 1982 GT 2003 F350 6.0

03-21-2004, 03:46 PM	#4
DirtKing Registered Member Join Date: Feb 1999 Location: brooklyn center,mn,USA Posts: 169	two schools of thought: 74 and earlier blocks have more metal.. later blocks have better metal and casting practices. i suspect it is a wash, but who knows?? __________________ 88LX notch, Speedpro EFI 358windsor 11.2 to 1 compression, 5 lug baer claws all around..g force t5 and 3.55 gears. rwhp soon to come. Oh yeah...92 octane NO detonation.

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