Strength of 351's

VeNuM · 01-06-2003, 10:21 PM

I'm building a 408 and need a stock block, first what horsepower are these capable? Which years are the best? So far I've been told to find a pre 76 block. Is it hard to convert those old blocks to a roller block? ~Brian

BilLster · 01-07-2003, 12:55 AM

71-74 are getting hard to find 69-70 are shorter.

as far as converting there are two ways small chevey stle cam and stock 5.0 spyder gear . or normal cam with roller lifters with bars.
'
I just saw some slotted roller lifters with a keyway and no bars for a chev so im trying to find if they make them for Ford yet.

hp depends on the prep. if its a concern get a sportsman block

my present on hits 700 but im thinking of lowering the torqu curve now.

VeNuM · 01-07-2003, 02:18 PM

The sportsman block isn't in the funds and I've heard the stock 351's are good up to ~750hp. Better than the 450hp 302's. ~Brian

bigredstang · 01-07-2003, 03:35 PM

I think that the sportsman block (the $800 one) is rated at about 600 HP by ford. How are you getting 750 from a stock block?
Greg

BilLster · 01-07-2003, 08:01 PM

arp bolts locwire gaskets good prep hot tanking and using torque plate's also turbo's are alot esier on motor's than na or super charges i normal keep boost 6-8 lbs on the street and 12-14 at the track

this is real boost ive seen a gauge read 20 lbs when ive had i set at 14 lbs

also hp ratings differ constant and max.

but seriously prep and maint cooling oiling fuel and all systums up to the task i have a 2 bolt mains with studs and a scraper with a windage tray and a girdle I want to set up a spayed sportsman block.

VeNuM · 01-07-2003, 10:33 PM

There was a splayed main Sportsman block out at the shop, what a nice looking engine! I believe the Sportsman 302 is rated at 700hp. The 351 is a lot stronger of a block than those 302's though. I'm definately going to get a girdle (Probe one, it's on the way) scaper, and windage tray. I'm also staying n/a. ~Brian

01-06-2003, 10:21 PM	#1
VeNuM Registered Member Join Date: Apr 2002 Location: Downers Grove, IL Posts: 464	Strength of 351's I'm building a 408 and need a stock block, first what horsepower are these capable? Which years are the best? So far I've been told to find a pre 76 block. Is it hard to convert those old blocks to a roller block? ~Brian __________________ 1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's Coming not so soon: 408w Ricer Hater's Club Member #59

01-07-2003, 12:55 AM	#2
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	71-74 are getting hard to find 69-70 are shorter. as far as converting there are two ways small chevey stle cam and stock 5.0 spyder gear . or normal cam with roller lifters with bars. ' I just saw some slotted roller lifters with a keyway and no bars for a chev so im trying to find if they make them for Ford yet. hp depends on the prep. if its a concern get a sportsman block my present on hits 700 but im thinking of lowering the torqu curve now. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

01-07-2003, 02:18 PM	#3
VeNuM Registered Member Join Date: Apr 2002 Location: Downers Grove, IL Posts: 464	The sportsman block isn't in the funds and I've heard the stock 351's are good up to ~750hp. Better than the 450hp 302's. ~Brian __________________ 1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's Coming not so soon: 408w Ricer Hater's Club Member #59

01-07-2003, 08:01 PM	#5
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	arp bolts locwire gaskets good prep hot tanking and using torque plate's also turbo's are alot esier on motor's than na or super charges i normal keep boost 6-8 lbs on the street and 12-14 at the track this is real boost ive seen a gauge read 20 lbs when ive had i set at 14 lbs also hp ratings differ constant and max. but seriously prep and maint cooling oiling fuel and all systums up to the task i have a 2 bolt mains with studs and a scraper with a windage tray and a girdle I want to set up a spayed sportsman block. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

01-07-2003, 10:33 PM	#6
VeNuM Registered Member Join Date: Apr 2002 Location: Downers Grove, IL Posts: 464	There was a splayed main Sportsman block out at the shop, what a nice looking engine! I believe the Sportsman 302 is rated at 700hp. The 351 is a lot stronger of a block than those 302's though. I'm definately going to get a girdle (Probe one, it's on the way) scaper, and windage tray. I'm also staying n/a. ~Brian __________________ 1989 Black Mustang GT Hatchback, Underdrive Pulles, Electric Fan, Cold Air Intake, Headers, Offroad H-Pipe, Magnaflow catback, Steeda Tri-Ax, Fluidyne Aluminum Radiator, Timing at 14*, 3.73's Coming not so soon: 408w Ricer Hater's Club Member #59

01-07-2003, 03:35 PM	#4
bigredstang Registered Member Join Date: Mar 2000 Location: lincoln, NE Posts: 80	I think that the sportsman block (the $800 one) is rated at about 600 HP by ford. How are you getting 750 from a stock block? Greg

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