Rajo, Fronty, Chevy conversion. Nothing too exotic. Prefer complete set up with manifolds, etc. contact off list: email@example.com
Hey Rod, Mark Chaffin makes an excellent reproduction Rajo BB head with everything you need (minus a carburetor). He's on the forum a good bit and also has a website for his product: http://www.rajoreproductions.com
If you're on a budget sometimes they come up reasonable, but then, they usually need some work, or are missing parts. If you want to play with OHV, be prepared to reach into your pocketbook.
Thank you Seth for the plug:D
No problem Mark. I really want one of your BB kits, but right now I'm trying to scrounge up money for a simple valve job and new cam!
I understand. The economy has everyone over a barrel. we'll be here when things improve:D
You could go with a Jern Thunderbolt setup.
Thanks for all the feedback. I have had my '27 Roadster for over 50 years - restored it with my dad. It has an excellent engine built by Fred Upshaw with the goodies that were considered "state of the art" for model T's way back when: Ruckstell, 3:1 gears, Rocky Mountains, Ricardo Head, Tillotson Carb, MilesBilt Split Exhaust manifold, still runs the timer - we tried a Delco distributor but the timer was superior. I have been intrigued by T overheads since I was a kid and was recently offered a 2 port Chevy Head. As I have never been a Chevy man I thought I would consider something more Model T appropriate prior to taking the plunge. Why now? I retired two weeks ago.
All the best Rod
Stick with an accessory OHV made especially for a Ford ! Y.M.M.V. from a RAJO BB owner.
The Chevrolet brothers made speed parts for Ford Model T's.
Rod, If you were recently offered (as in free), a complete usable 28 Chevy two port head, then what I said about reaching deep into your pocket, doesn't apply. I was assuming that you, like the rest of us, didn't have such good fortune and you were going to have to buy everything from scratch, paying today's market prices. If you've got a Chevy head, buy Neal Jern's kit and go for it. I have a 4 valve F head Rajo, but would gladly trade it for a Chaffin's Rajo BB reproduction setup.
If I was offered a 28 Chevrolet head with it's bigger valves I would jump and start saving my pennies for the Thunderbolt kit. I have a 26/27 Chevrolet head but the valves are about the same size as the T so not much improvement would be gained in the breathing department, compression, yes.
Like Steve, I prefer a head specifically designed for a Model T. I really like my Fronty but the various RAJO and other heads all have their fans. Folks seem to swear by or swear at the Chevy head conversions. A buddy had one that ran really strong as long as he could keep it cool and the gaskets didn't blow. Both were issues that caused him to switch to a RAJO. We really struggled with that head and I'm still not sure how much of the difficulty was with the head or kit. The frustration level just got greater than the fun. His RAJO runs great without the issues.
Rod, I hear Fred Upshaw won the Montana 500 one year, but was disqualified when they found the Chevy crank and rods. Fred became known for Chevy crank/rod conversions. The engine in the ol' brass picup was done by Fred, complete with Fronty R head.
You will have to drop the pan to see if you have Chevy crank. It's same stroke as T, but 25 lb, vs. 15 lb. for the T crank.
You can learn a lot more about OHV - Heads with much more information to be added in the future