Crappy end to an Awesome day in my maverick...

But with the 3F1 casting date it wasn't born till June 1 1973, so it's a '73 or maybe even a early '74 engine... Unless it's been decked, will have the extra .023 of deck height to reduce compression...

If the heads have a good set of springs and those push rods were some of the spaghetti strength originals, possibly they are the only problem...

 

Sorry boys but been quite a while since my last post.....life sometimes gets in the way of living.....

UPDATE: decided to scrap the '73 306 and found me a "Donor" 5.0 HO out of a '93 Convertible Mustang GT. It "IS" a roller with "XXX" cast into the lifter Valley and has casting numbers "E7TE, 33 and CA" cast in the very lower corner of bottom Bell housing bolt boss, Pass side under the starter. I DO know it is a 1987 motor "E= '80s decade and 7 = Year etc..." and NOT orig. to that car.....

Now my apprehension is there is "SO" much he said she said out there on this InterWeb on these casting numbers saying it is a "Truck Block" does anyone have any "Solid" advice cause there is just enough out there saying it is a real HO Mustang motor as well just wrong year for that car........ I would like to have that warm and fuzzy feeling just to ease my mind..... there is also an abundance of back and forth over it having Forged pistons and not.... just would like to know "just to know"..... should have the old girl back up and running next week or two.....time permitting...

 

Digging a little deeper into the new 5.0 with the valve covers off I found casting numbers "7D27" in same locale as my GT40P casting, and a circled "CP" and a "T" by the lower right head bolt boss but no other markings/stampings/castings........ I google'd the ever loving life out of these numbers but no info.....all I can find is "E7TE" head info.....I do NOT have E7TE Heads but I DO have a E7TE Block. I do NOT have E7TE Heads but rather 7D27 heads........ getting a bit Fur-rusterated....... Any body got some rope?!?!

 

Got the heads off the "new to me" motor and I have beautiful cylinders with No ridge next to no wear and the pistons have 4 Valve reliefs with part # E7ZE-6110-CA stamped in them which lends me to believe them to be the sought after Forged HO versions...... Score! I am digging how sweet this booger turns over...next to no friction with the roller cam....very noticeable to me....she was not all that very well cared for oil change wise as there was substantial "Coking" under the intake side edge of the cylinder heads but not anything I never expected....just gonna knock the sludge off and slap a gasket set to it and run er till this winter till I can do a proper freshening up.. the rods have a less then "Sharp" edge to the casting line but then so do my other rods both motors have same part numbers cast into the rods.....D10E-AA 201, 202 or 203's no rhime nor reason on placement of the 201,202 203.....so that kind of puzzles me......now just a trip to NAPA for a gasket set and wait on Summit for my 50 oz C-4 Flexplate to arrive and then start the piecing it all back to gether....

 

The E7TE's I have, have the "T" cast into them, if that's any help.

 

sweet thanks!! I reckon in my Fur-Rusteration I overlooked the "7D27" as head ID casting but rather a "date code" maybe..... makes sense both heads and block are "E7TE".....I did note the under side of all 8 pistons say "TRW" so yes I have the Forged 5.0 HO pistons.... I also pulled the cam just now and found the stampings to read "B" top and bottom with an "11" stamped close to the center point on another chat board I am told "B" cams to be .480 lift....... Boy I reckon with my other set of Cobra 1.7 Roller rockers on those GT40P heads she should be up around .510 with a "real good" lope!!! CANNOT wait to hear the wick get lit on this little firecracker!!!!

 

oh my mistake on the Con Rod casting numbers.....NOT 201,202,203 but rather 231, 232,and 233 and they all have the "Flat" balance pad on the rod cap bottom......so I reckon these to be the "Cast" Rods not the Forged Steel any body care to correct me on this?!?!

 

Say DaveB, your E7TE heads are in fact 5.0 HO???? Sorry but this is one thing that alluded me finding "Solid" info confirming that number match........ Thanks for your help!!!

 

As far as I know, the fox bodied 5.0L's all had E7TE's, but so did a 93 E250 I bought. They were originally truck heads, before they used them on the Mustangs.

 

7 = 1987
D = April
27 = 27th

Your heads were cast on April 27th, 1987 which makes them correct for a 1987 Model year.

 

What are your plans for the GT40 heads? oooppps...
Sorry I just saw they were GT40P heads.

 

Thanks DaveB!! And thanks for the code breakdown Paul....figured after the fact of posting it must have been a date code but thanks again for laying it out for me! As for the GT40P's ........MAN!! Everbody is dogging them something Fierce! But I like 'em.......I know how they ran with bent pushrods and I was digging them then....cannot wait to see them run with this "B" cam!!! My local Ford speed shop says they aren't "all that" either , but they are damn sight better then the E7TE's or anything else without spending buckets of $$$$$ going Al-you-min-yum...... I may get crazy and pocket port them a bit and see what that does but just to play with....when I get serious I will go with the Twisted Wedges.....after the subframe connectors, and Posi 9" upgrade......but for now she will Still raise a few eyebrows rolling thru the Dairy Queen!!!! I Bet you!!

 

I've spent hours on my E7TE's, and they seem fine, I have a set of GT40's for my next project, I can't wait to see the difference in the engines.

 

I'm kinda ticked off at Dairy Queen right now, went there Sunday night to get a Banana Split and it was crappy, had no strawberry or pineapple toppings at all and barely had fudge on it....going to Sonic from now on.
Yeah the GT40P heads are a PITA to use with headers.

 

I have a set of 1965 Mustang Hi-Po cast Headers that bolt right up to them GT40P's and fit "perfectly" between the shock towers....... no fitment issues and a Breeze to put on!!! As soon as i can rub two nickels together I would like to "Extrude Hone" them to get them to flow a little better but that is Pricey!! They do fairly well now....but I am sure a set of Shorty's would flow far Much Better.......and be Much, much lighter......but I also like raising eyebrows with the "Awwww....Damn! this thing is BONE Stock aside from the two four barrels"....comments..... then they hear it run......oh, Snap!!!